The area studied consists of a portion of the Sunland\r\nquadrangle in Southern California. The area is about seventeen miles northwest of Pasadena, California, and is best reached by automobile from Pasadena by driving westward on Foothill Boulevard.
\r\n\r\nThe area is slightly over one mile square in size,\r\nand is bounded on the west by Bartholomaus Canyon, and on the east by Little Tujunga Canyon. The district is cultivated in orange and lemon groves in the southern section, and the entire area, especially Kagel Canyon, is well populated.
\r\n\r\nField work was done with pace and Brunton compass on\r\na photographic enlargement of U.S.G.S. topographic map of\r\nthe Sunland quadrangle. The mapping and report were done in\r\npartial fulfillment of the requirements for the degree of\r\nBachelor of Science at the California Institute of Technology.
\r\n\r\nAbout twenty days were spent in the field in mapping and\r\ngathering of data. Work was done from January to June, 1940.
\r\n" }, { "name": "Cleveland, William Roy", "degree": "Bachelors", "year": "1940", "title": "Geology of Black Butte, Los Angeles County, California. Geology of the Puente Hills", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12212009-142344833", "creators": [ { "name": { "family": "Cleveland", "given": "William Roy" }, "id": "Cleveland-William-Roy", "display_name": "Cleveland, William Roy" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/HJXM-EW72", "abstract": "Geology of Black Butte, Los Angeles County, California
\r\n\r\nThe area studied lies directly on the First Standard\r\nParallel North of the San Bernardino Base and Meridian in\r\nthe Black Butte Quadrangle, Los Angeles County, California.\r\nBlack Butte is about 125 miles by auto northeast of Los\r\nAngeles. The size of the area is about 1 square mile,\r\nwith a relief of approximately 600 feet. No part of the\r\narea has been put under culture. The field work was conducted by topographic location and with Brunton compasses\r\ninsofar as was practicable. Five days were spent in the\r\nfield. The work was undertaken to give the author\r\nexperience in igneous geology.
\r\n\r\nGeology of the Puente Hills
\r\n\r\nThe area described in this report, is that part of the\r\nPuente Hills, California, lying to the north and west of\r\nthe Turnbull Canyon road, and is the extreme western end\r\nof this range of hills. The area is most readily reached\r\nby the Turnbull Canyon road from the town of Whittier, which\r\nlies about two miles to the southwest. Whittier is some\r\nthirteen miles east of Los Angeles. The area in question\r\nlies on the common corner of the El Monte, Puente, Whittier,\r\nand La Habra quadrangles, and has an area of about four\r\nsquare miles. A small portion (perhaps five percent) is\r\nunder cultivation with citrus and avocado orchards.\r\nApproximately ninety percent of the total area is grazing\r\nland for sheep, horses, and dairy cattle. The remaining\r\nfive percent is covered with sage and other brush. The\r\nrelief is about 1200 feet, the elevations ranging from\r\n250 to 1400 feet. The drainage in this particular portion\r\nof the Puente Hills is east and west, since a long ridge\r\ntrends almost due north across the area. The topography\r\nappears to be in early maturity. Outcrops are fairly\r\nabundant, but in many cases do not lend themselves readily\r\nto giving a dip and strike. The field work was done with\r\na topographic map by the U.S.G.S., and a Brunton compass.\r\nFifteen days were spent in the field.
\r\n" }, { "name": "Haffner, Bernhard K.", "degree": "Bachelors", "year": "1940", "title": "Geology of Part of the Adelanto Hills. Report on the Geology of the Puente Hills", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12222009-152143529", "creators": [ { "name": { "family": "Haffner", "given": "Bernhard K." }, "id": "Haffner-Bernhard-K", "display_name": "Haffner, Bernhard K." }, { "name": { "family": "Wasem", "given": "Richard" }, "id": "Wasem-Richard", "display_name": "Wasem, Richard" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/K1QH-J834", "abstract": "Geology of Part of the Adelanto Hills:
\r\n\r\nThe Adelanto Hills are a low range of folded limestone, situated about five miles northwest of Adelanto, California. The limestone is a dark blue finely crystalline, roughly bedded type, which has been hydrothermally altered in places to a white crystalline limestone, or to a fine grained highly altered brown limestone. The main igneous rock outcrops in the south part of the area and is a light colored, coarse grained granodiorite body that apparently has been faulted into place. A complimentary association of several fine grained, dark colored granodiorite intrusions and numerous pegmatite dikes occurs in the northern part of the area. Several large light colored acidic dikes intrude the limestone and their relationships to the other igneous rocks cannot be determined, with the exception that they are earlier than the pegmatite. The alteration of the blue limestone to the white limestone is due in part to the cutting of the area by the acid dikes. Hydrothermal solutions controlled to some extent by igneous contacts, the bedding of the blue limestone and possibly by faults, are responsible for the rest of the alteration. The area is cut by a large fault trending N65W and by numerous smaller faults trending about N2OW. The structure on either side of the main fault is roughly parallel. The mineralization of the area is mainly a contact metamorphic type, the ore minerals being lead, zinc and silver. Oxidation has resulted in some secondary enrichment, especially of silver. Some scheelite is mined at the present time from a contact zone between porphyry and limestone.
\r\n\r\nReport on the Geology of the Puente Hills:
\r\n\r\nThe area mapped consists of one and two thirds square miles known as the Puente Hills. The Hills are located directly east of the town of Puente and are about fifteen miles south-east of Pasadena. The purpose of the mapping was to give a student geologist some experience in mapping and interpreting a structure of folded sediments.\r\nApproximately ten days was spent in the field completing\r\nthe mapping. The method used was a Brunton Compass traverse with a U.S.G.S. topographic map.
\r\n\r\n" }, { "name": "Kupfer, Donald Harry", "degree": "Bachelors", "year": "1940", "title": "Geology of Bluff Cove", "advisor": "Bode, Francis D.", "url": "https://resolver.caltech.edu/CaltechTHESIS:12222009-145022250", "creators": [ { "name": { "family": "Kupfer", "given": "Donald Harry" }, "id": "Kupfer-Donald-Harry", "display_name": "Kupfer, Donald Harry" } ], "advisors": [ { "name": { "family": "Bode", "given": "Francis D." }, "id": "Bode-F-D", "role": "advisor", "display_name": "Bode, Francis D." } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/P61H-JQ87", "abstract": "Bluff Cove is situated on the west side of the San Pedro Hills and lies about twenty miles south-west of Los Angeles. The area mapped includes Flat Rock Point to the north of Bluff Cove and Rocky Point to the south, a distance of about two and one-half miles (pl. 1). Only the sea cliffs were mapped, the hope being that from these cliffs the inland structures could be extrapolated.
\r\n\r\nI am indebted to Mr. D.J. Varnes, who worked with me constantly both in the field and in the office, and offered many valuable suggestions; and to my instructor, Dr. F.D. Bode.
\r\n\r\nThe map is of the north half of the area. It is a hand drawn enlargement (x4) taken from the 1932 reprint of 1928 edition of the U.S.G.S. topographic map of the San Pedro Hills Quadrangle. The Geologic mapping was done by Brunton compass in 1939-40.
\r\n\r\nThe topography of the area is one of rolling hills sloping to the ocean. The present sea cliffs, to which the mapping was confined, average about 150 feet high and afford good exposures. However, the lower parts of the cliffs are usually masked by landsliding.
\r\n" }, { "name": "Kupfer, Donald Harry", "degree": "Bachelors", "year": "1940", "title": "Geology of a Part of Seminole Quadrangle, Los Angeles County, California. Geology of the Bluff Cove Region, Palos Verdes, Southern California", "advisor": "Bode, Francis D.", "url": "https://resolver.caltech.edu/CaltechTHESIS:12212009-094211744", "creators": [ { "name": { "family": "Kupfer", "given": "Donald Harry" }, "id": "Kupfer-Donald-Harry", "display_name": "Kupfer, Donald Harry" }, { "name": { "family": "Varnes", "given": "David Joseph" }, "id": "Varnes-David-Joseph", "display_name": "Varnes, David Joseph" } ], "advisors": [ { "name": { "family": "Bode", "given": "Francis D." }, "id": "Bode-F-D", "role": "advisor", "display_name": "Bode, Francis D." } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/2CDA-NY71", "abstract": "Geology of a part of Seminole quadrangle, Los Angeles County, California:
\r\n\r\nA small area in the Central Santa Monica Mountains was mapped. Two formations, a series of interbedded basalts and pyroelastics of Topanga age and some Modelo shales and sandstones, were mapped and an angular unconformity was found between them. The region is one of broad folds with axes trending generally east-west.
\r\n\r\nGeology of the Bluff Cove Region, Palos Verdes, Southern California:
\r\n\r\nAbout two miles of sea cliffs were examined at the west end of the Palos Verdes Hills, in southern California. Middle and lower upper Miocene breccia, sandstone, and shale have been intruded by sills of basalt. Faulting and minor folding have taken place since the intrusion. Successive terraces indicate repeated uplift in Pleistocene time.
\r\n\r\n" }, { "name": "Oder, Frederic Carl Emil", "degree": "Bachelors", "year": "1940", "title": "The Geology of a Part of Seminole Quadrangle, Los Angeles County, California. Geology of Black Butte Quadrangle, Los Angeles County, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12172009-090858971", "creators": [ { "name": { "family": "Oder", "given": "Frederic Carl Emil" }, "id": "Oder-Frederic-Carl-Emil", "display_name": "Oder, Frederic Carl Emil" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/8XQZ-4Q47", "abstract": "The Geology of a part of Seminole Quadrangle, Los Angeles County, California:
\r\n\r\nThe work was done in partial fulfillment of the requirements for a Senior Thesis problem at the California Institute of Technology. The area mapped lies roughly as a strip in the central portion of Seminole Quadrangle, Los Angeles County, California. It is bounded on the north by the Los Angeles - Ventura County line, on the east by a line drawn southward from the intersection of the east boundary of Rancho Las Virgenes and the county line, on the south by a line approximately two thousand feet south of the San Bernardino Base Line, and on the west by Medea Creek. The area described is approximately six and one-half square miles in extent. The field work was done in the spring of 1940 and took approximately eighty hours to complete.
\r\n\r\nMapping was done by Brunton Compass on U.S.G.S. base maps\r\nphotographically enlarged to a scale of one inch equals one thousand feet (1/12000).
\r\n\r\nThe formations within the area are middle Miocene basalt flows with interbedded pyroclastics overlain unconformably by Modelo shales and sandstones. The relief is slightly less than six hundred feet. Exposures are good, with the exception of the alluviated valley adjacent to Ventura Boulevard.
\r\n\r\nGeology of Black Butte, Black Butte Quadrangle, Los Angeles County, California:
\r\n\r\nThe work entailed in mapping the geology of Black Butte\r\nwas done in partial fulfillment of the requirements for a Senior Thesis problem at the California Institute of Technology. This desert butte has its center located at the intersection of the first parallel north of the San Bernardino Base Line end a north-south line at the longitude 117\u00b043\u201930\" west of the Greenwich Meridian,\r\nand covers an area of approximately three-quarters of a square mile. The field work was done in April of 1940 and required approximately twenty-five hours to complete.
\r\n\r\nMapping was done by Brunton Compass on U.S.G.S. base maps\r\nphotographically enlarged to a scale of one inch equals five hundred and sixty-three feet (1/6760).
\r\n\r\nThe rocks found within the area are an igneous series together with a very small amount of metamorphosed sedimentary rock which is apparently present as inclusions in one member of the igneous series. This igneous series, together with the metamorphics, have been intruded\r\nby later dikes of aplite, pegmatite, quartz, and aplite-pegmatite. Since the intrusion of the dikes there has been minor faulting followed by mineralization chiefly in the form of epidotization.
\r\n\r\nThe butte is roughly oval in plan view with the long axis of the oval extending in a northwest direction. Towards the southeast end there is a narrow projection extending east-south-east. The butte is a mountain remnant projecting out from the alleviated floor of the Mojave Desert here formed by the ends of fan deposits extending from the base of the San Gabriel to the south. Rising steeply from the alluvial desert floor Black Butte has a relief of five hundred feet. Seen from a distance the butte appears dark colored due to the extensive coating by \u201cdesert varnish\u201d of the boulders of the gabbrodiorite intrusive which cover a large part of the surface.
\r\n\r\nIn general, exposures were very poor and pertinent information is obscured. The mapping of the dikes was best accomplished by first determining their actual presence and character at the few existing exposures, and then following the traces of their courses by observation from a not too distant vantage point.
\r\n" }, { "name": "Quarles, Miller Winthrop", "degree": "Bachelors", "year": "1940", "title": "Geology of the Whittier Hills, Whittier, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12212009-145549839", "creators": [ { "name": { "family": "Quarles", "given": "Miller Winthrop" }, "id": "Quarles-Miller-Winthrop", "display_name": "Quarles, Miller Winthrop" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/8KVA-7V53", "abstract": "This report is an attempt to unravel the structure of the very complicated western portion of the Puente Hills known as the Whittier Hills. The only comprehensive published study of it was made by English in 1926.(1) Of the Whittier Hills portion he said, \"The Whittier Hills, comprising the area west of La Habra Canyon, show some of the most complicated structure to be found within this district. Steep irregular dips, numerous faults, unconformities, and lithologic variations in the different formations and members make the structure, as well as the stratigraphy, difficult to work out.\"(2)\r\n\r\nThe mode of approach has been that of a very detailed examination in which every attitude available has been recorded. The petrographic interests have been sacrificed to permit a closer structural analysis of a larger area. Some semblance of order has thus been obtained for most of the area.\r\n\r\nThe situation briefly is this: a section of upper Puente shale and part of the Repetto siltstone and conglomerate have been folded and faulted into apparently unrelated blocks. Included in these structures are one hundred mappable lithologic units, twenty-five different faults, and nine major folds. The most westerly portion of the Whittier Fault disappears in the area, and thereby presents the problem of determining its westward extension. The area has two distinct oil-producing fields and has been mapped by many oil companies in exploration for others. The folds mapped may thus be of interest from an economic point of view.\r\n\r\n1. English, Walter A., Geology and Oil Resources of the Puente \r\n Hills Region, So. Calif., U.S.G.S. Bulletin 768 1926\r\n\r\n2. Ibid, p.58\r\n" }, { "name": "Reynolds, Howard W.", "degree": "Bachelors", "year": "1940", "title": "Geology of a Section of the Palos Verdes Sea Coast. Geology of a Portion of the Adelanto Hills", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12232009-145700177", "creators": [ { "name": { "family": "Reynolds", "given": "Howard W." }, "id": "Reynolds-Howard-W", "display_name": "Reynolds, Howard W." } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/CQRP-SZ39", "abstract": "Geology of a Section of the Palos Verdes Sea Coast:
\r\n\r\nThe area in which this work was done is located in the San Pedro Hills Quadrangle. It can be reached by following the Roosevelt Highway south from Redondo, California, then following the branch off this highway along the coast. The area begins about one eight mile south of San Vicente Lighthouse at Long Point, extends southeast for a little over four miles along the coast.
\r\n\r\nThe area includes the sea cliffs along the ocean. It does not constitute a true area because no extension back from the coast was studied.
\r\n\r\nThe area was investigated on foot, there being only two places accessible by car, one at Abalone Cove and the other at Portuguese Bend.
\r\n\r\nGeology of a Portion of the Adelanto Hills:
\r\n\r\nThe Adelanto Hills are a low range of folded limestone hills, situated about five miles northwest of Adelanto, California. The limestone is a dark blue, finely crystalline banded type, which has been hydrothermally altered in places to a white crystalline limestone, or to a fine-grained, highly altered brown limestone. The alteration is indistinctly associated with faulting and minor intrusions in the area. The main igneous body in the area is a large granodiorite body that apparently has been faulted into its present position. A complementary association of a fine-grained dark intrusion and numerous pegmatite dikes occur in the northwestern part of the area. Several large, light colored acidic dikes intrude the limestone, and their relationships to the other intrusions cannot be determined. The area is cut by a large fault tending N65 W and by numerous smaller faults trending about N20 W. The structure on either side of the main fault is roughly parallel. Mineralization of the area is mainly a contact-metamorphic type, containing lead, zinc, and silver. Considerable oxidation in the area has occurred, resulting in some secondary enrichment, especially of silver. Some scheelite is mined at the present time from a contact zone between porphyry and limestone.
\r\n\r\n" }, { "name": "Staatz, Mortimer Hay", "degree": "Bachelors", "year": "1940", "title": "Geology of Mount Pinos area, Ventura County", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12172009-102258541", "creators": [ { "name": { "family": "Staatz", "given": "Mortimer Hay" }, "id": "Staatz-Mortimer-Hay", "display_name": "Staatz, Mortimer Hay" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/70E8-YH64", "abstract": "This paper is written on the geology of the northern half of Lockwood Valley, which is located in northern Ventura County. The area in general is mountainous, and includes Mt. Pinos (8826 feet) as its highest peak.\r\n\r\nThe rocks consist of two igneous member (granite and basalt) and many sedimentary ones (shales, sandstones, and conglomerates). The oldest rock is granite intruded in the Jurassic. This is overlain by a series of continuous, marine sediments of Eocene age. These are overlain by a basalt flow which was extruded in early Miocene times. Both marine and terrestrial beds of the same age overlie the basalt. The only subsequent deposits are of terrace gravels and alluvium.\r\n\r\nFaulting is the most prominent type of structure. Voiding is present, but plays a very minor part on the area studied. There are two sets of faults, one running concentrically about the other radially to Mt. Pinos. The second set is of little importance, The first set, is made up of four large faults, which uplift sediments and granite along the southern side of Mt, Pinos.\r\n\r\nFrom an economic standpoint this is a place of both recent and historical interest. The region was one of the first localities in which borax was mined (1899), and mining was continued intermittently until 1913. Gold has been taken in large quantities from the southern side of Lockwood Valley since the early 18801s. At the present time the area has a new business in the mining of rotary mud. This is done by steam shovel from one of the valley's many clay beds." }, { "name": "Van Dyke, Gilbert Rusk", "degree": "Bachelors", "year": "1940", "title": "Geologic Report of Black Butte, Antelope Valley, California. Geologic Report of Puente Hills, Puente, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12172009-101113697", "creators": [ { "name": { "family": "Van Dyke", "given": "Gilbert Rusk" }, "id": "Van-Dyke-Gilbert-Rusk", "display_name": "Van Dyke, Gilbert Rusk" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/C1DF-3367", "abstract": "Geologic report of Black Butte, Antelope Valley, California:
\r\n\r\nThe Black Butte is a distinct hill among other remnant hills in the southern Antelope Valley. Nearly all the other buttes in the vicinity are grayish tan in color and consist of granite cut by numerous splite and pegmatite dikes. The Black Butte has, besides this granite massif, a cap of diorite which weathers black and hence gives the hill its name.
\r\n\r\nGeologic report of Puente Hills, Puente, California:
\r\n\r\n\r\nA portion of the Puente Hills west of the Pass and Covina Road and east of the town of Puente comprises the area. The structure under the hills are an anticline plunging to the west, a fault running north, and south through the center of the area, and overturning to the north of the eastern portion of the fold. Two rock types, shale and conglomerate, of upper Puente Formation of Upper Miocene time, comprise the area.
\r\n" }, { "name": "Weir, Gordon Bruce", "degree": "Bachelors", "year": "1940", "title": "Geology of a Portion of the Sunland, California Quadrangle", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12162009-092858574", "creators": [ { "name": { "family": "Weir", "given": "Gordon Bruce" }, "id": "Weir-Gordon-Bruce", "display_name": "Weir, Gordon Bruce" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/4BV2-QF66", "abstract": "The area treated in this report is approximately one square mile in extent, and is located in the northern part of the Sunland quadrangle in Southern California, about seventeen miles northwest of Pasadena, California. The area studied is bounded on the west by Bartholomaus Canyon, on the east and south by Little Tujunga Canyon, and extends 1000 feet north of Dexter Park. The area is best reached from Pasadena by automobile by driving west on Foothill\r\nBlvd. twelve miles from Devil's Gate Dam. The area has been\r\ncultivated to some extent, largely in the form of small orange groves located in the Quaternary alluvium deposits of the larger canyon.
\r\n\r\nThe area was investigated in partial fulfillment of the requirements for the degree of Bachelor of Science at the California Institute of Technology. The mapping was done with Brunton compass and pacing, using a photographic enlargement of a U.S.G.S. map, on a scale of one inch to 770 feet. Approximately twenty days were spent in the field.
\r\n" }, { "name": "Battle, John Allen", "degree": "Bachelors", "year": "1939", "title": "Geology of the Placerita Canyon Area", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12172009-103056785", "creators": [ { "name": { "family": "Battle", "given": "John Allen" }, "id": "Battle-John-Allen", "display_name": "Battle, John Allen" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/ZG11-6F43", "abstract": "The Placerita Canyon Region is about seven miles west\r\nof Newhall. It lies north of Placerita and Reynier Canyons and to the west of Sand Canyon. The bounding meridians are Lat. 34\u00b022' - 34\u00b025' N. and Long. 118\u00b027' W. A small\r\nsection lies south of Placerita Canyon at the foot of the\r\nSan Gabriels.
\r\n\r\nThe Placerita Canyon Region may be reached by two\r\nroutes from Newhall. It is necessary either to go through\r\nSolamint along the Santa Clara River and up Sand Canyon or\r\ndirectly through Placerita Canyon. The Placerita Canyon road\r\nis a rough, one way affair and is usually washed out. The Sand Canyon road is the north end of the Little Tujunga highway, and naturally is quite good. Refer to Fig. 1.
\r\n\r\nThe area is a close approximation to a rectangle\r\nof about eleven square miles.
\r\n" }, { "name": "Flint, Delos Edward", "degree": "Bachelors", "year": "1939", "title": "The Geology of a Portion of the Humphreys Quadrangle, California", "advisor": "Maxson, John H.", "url": "https://resolver.caltech.edu/CaltechTHESIS:12232009-104423910", "creators": [ { "name": { "family": "Flint", "given": "Delos Edward" }, "id": "Flint-Delos-Edward", "display_name": "Flint, Delos Edward" } ], "advisors": [ { "name": { "family": "Maxson", "given": "John H." }, "id": "Maxson-J-H", "role": "advisor", "display_name": "Maxson, John H." } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/R5GP-JG41", "abstract": "Included in the tract studied are four sedimentary formations and the recent alluvium. These formations are in the order of their deposition: the Mint Canyon, the Modelo, the Saugus, and the old alluvium or terrace deposits. The Mint Canyon and the Saugus formations are both of terrestrial origin; the Modelo is of marine. The area is of especial interest because each of the beds rests unconformably on the next under it, and because the boundary of the basin of deposition is included in its extent. This evidences itself with the thinning of the Modelo and the overlapping of the Saugus onto the Mint Canyon. There has also been deformation and minor faulting, especially in the northern portion." }, { "name": "Gombotz, Joseph John", "degree": "Bachelors", "year": "1939", "title": "The Geology of a Portion of Humphreys and San Francisquito Quadrangles", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12172009-094322384", "creators": [ { "name": { "family": "Gombotz", "given": "Joseph John" }, "id": "Gombotz-Joseph-John", "display_name": "Gombotz, Joseph John" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/3MMF-ME33", "abstract": "The rocks of this area range in age from the pre-Cambrian Pelona schist to the Recent alluvium. This metamorphic formation is separated from the two sedimentary formations by a formation of two igneous intrusives, which have been faulted into their position between the Pelona schist and the Sespe (Oligocene?) formation, the igneous rock, granodiorite and leucomonzonite, caused the extreme tilting of the Sespe when they were faulted into their present position. These rocks are probably of Jura-Cretaceous age. The Sespe is a thick series (approx. 4000 ft.) of continental deposits, now in a more or less consolidated condition. The Lower Upper Miocene Mint Canyon formation is another continental: series deposited unconformably upon the Sespe. It consists, in the lower section, of coarse conglomerates, sandstones and shales with some ash beds in the upper part which show some volcanic activity during Upper Miocene times. The region then underwent some folding and gentle tilting in post- Miocene times and a mature land surface was formed. There was a deposition of terrace material in probably Pleistocene time after which the region suffered continuous uplifting until the present time." }, { "name": "Griffiths, John Robert", "degree": "Bachelors", "year": "1939", "title": "Geology of the Sand Canyon-Soledad Canyon area", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12162009-075340811", "creators": [ { "name": { "family": "Griffiths", "given": "John Robert" }, "id": "Griffiths-John-Robert", "display_name": "Griffiths, John Robert" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/9411-7N13", "abstract": "The region under consideration is known as the Sand Canyon-Soledad Canyon Area. It is situated about 7.8 miles to the east of the town of Saugus, and its easternmost boundary is near the station of Lang. It lies on the north-east slope of the western end of the San Gabriel Mountains.
\r\n\r\nIt is bounded on the north by Soledad Canyon, on the west by Sand Canyon and its tributary Gorman Canyon, and on the south-east by a line which is in a direction of S 26\u00b0 W and passes approximately .5 miles east of Lang. The landmarks used are taken from the U.S.G.S. Humphreys, Lang, Sylmar, and Little Tujunga Quadrangle Maps.
\r\n\r\nThe area is roughly triangular in shape, and covers an area of approximately 5 square miles.
\r\n" }, { "name": "Hagen, Robert Christian", "degree": "Bachelors", "year": "1939", "title": "Geology of a Portion of the South Side of the Santa Clara Valley Near Newhall, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12212009-095631190", "creators": [ { "name": { "family": "Hagen", "given": "Robert Christian" }, "id": "Hagen-Robert-Christian", "display_name": "Hagen, Robert Christian" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/ZS18-YW90", "abstract": "The area is located between the foot of the San Gabriel\r\nMountains and the Santa Clara River and is about four miles\r\neast of Newhall and Saugus, California. It is about thirty-six miles north of Los Angeles, California.
\r\n\r\nThe area is approximately two by two and a half miles in\r\nsize and contains about five square miles. It is bounded on\r\nthe north by the Santa Clara River; on the east, by the area\r\nworked by John A. Battle; on the south, by the San Gabriel\r\nMountains and Placerita Canyon; and on the west, by Longitude 118 28'.
\r\n\r\nThe area is conveniently reached by one of two roads.\r\nThe side to the north is reached from the Palmdale-Los Angeles State Highway which runs along the northern boundary. Someday this highway will pass through the area. From this highway, dirt roads lead towards the center of the area, passing through the valleys draining into the Santa Clara River. The south side is entered by means of the Placerita Canyon Road which turns off just north of the outskirts of Newhall. This road is paved part way, but is dirt the rest of the way. It is, however, passable, and makes it easy to get into the southern end. From this road, the center of the area can be reached by hiking up abandoned roads and trails. No part of the area is more than one mile's hike to reach.
\r\n" }, { "name": "Levet, Melvin Newton", "degree": "Bachelors", "year": "1939", "title": "Geology of Parts of the Pacoima and Sylmar Quadrangles", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12232009-092526144", "creators": [ { "name": { "family": "Levet", "given": "Melvin Newton" }, "id": "Levet-Melvin-Newton", "display_name": "Levet, Melvin Newton" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/Q8TB-9887", "abstract": "The area discussed in this report lies in the southeast portion of the Sylmar quadrangle and the northeast portion of the Pacoima quadrangle, Los Angeles County, California. The area may be reached from Los Angeles by driving northward on U.S. Highway No. 99 as far as San Fernando, then turning north for three miles to Foothill Blvd. (consult U.S.G.S. topographic map for roads leading directly into the area). From Pasadena the area may be reached by driving west on Foothill Blvd. through Sunland and Tujunga as far as the Olive View Sanitarium, a distance of about 22 miles from Pasadena." }, { "name": "Regan, Louis John", "degree": "Bachelors", "year": "1939", "title": "The Geology of a Portion of the Saugus and Red Mountains Quadrangles", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:03162010-145659017", "creators": [ { "name": { "family": "Regan", "given": "Louis John" }, "id": "Regan-Louis-John", "display_name": "Regan, Louis John" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/4WWA-QF70", "abstract": "The area discussed in this report lies in the southern part of the California Coast Ranges, and includes the north-eastern part of the Saugus Quadrangle, and the south-eastern part of the Red Mountain Quadrangle. The area is located about 40 miles north-east of Los Angeles, and is easily accessible by roads. From Los Angeles it is reached by route 99 through San Fernando, and then by route 6, which joins route 99 about 2 miles north of San Fernando, for about 2 miles to the junction with the Bouquet\r\nCanyon road. One should turn left on the Bouquet Canyon road, which passes the mouth of Haskell Canyon. There is a fairly good dirt road in Haskell Canyon.\r\n" }, { "name": "Scott, David Holcomb", "degree": "Bachelors", "year": "1939", "title": "The Geology of a Portion of Humphrey's Quadrangle", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12212009-135514171", "creators": [ { "name": { "family": "Scott", "given": "David Holcomb" }, "id": "Scott-David-Holcomb", "display_name": "Scott, David Holcomb" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/WW5D-7S89", "abstract": "Two sedimentary formations are present in this area; the Modelo formation and the Mint Canyon formation. The latter sediments make up most of the rocks in this region while the former is confined to the southwestern one-fourth of the area. An angular unconformity separates the marine Modelo (Upper Miocene) from the non-marine Mint Canyon formation (Lower-Upper Miocene). The sediments are typical of those deposited under semi-arid conditions. Conglomerates, sandstones, and clays are abundant. There has been little local faulting, but folding is developed to a high degree, especially in the sediments of the Mint Canyon. Recurrent volcanic activity has taken place in Miocene time and several ash beds are interbedded in the sediments. The only other rocks present in the area are some uplifted terrace gravels of Quaternary age and the recent valley alluvium." }, { "name": "Ahlroth, Carl Wilhelm", "degree": "Bachelors", "year": "1938", "title": "Geology of the Southern Part of the Red Mountain Quadrangle, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12212009-151213006", "creators": [ { "name": { "family": "Ahlroth", "given": "Carl Wilhelm" }, "id": "Ahlroth-Carl-Wilhelm", "display_name": "Ahlroth, Carl Wilhelm" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/E3F3-D756", "abstract": "An area of about twenty square miles in the southern\r\nhalf of the Red Mountain Quadrangle, Los Angeles County,\r\nCalifornia, was mapped geologically in the spring of 1938.\r\nThe area lies within the Transverse Ranges Province of\r\nCalifornia, and comprises the following rocks: a pre-Cambrian mica schist (Pelona schist), continental sediments of Oligocene (?) (Sespe formation) and lower-upper Miocene\r\n(Mint Canyon formation) age, and marine sediments of\r\nupper Miocene age (Modelo). The Sespe is overthrust over\r\nthe Pelona schist and the Mint Canyon. The Mint Canyon\r\nlies with a depositional contact upon the Pelona schist\r\nand is overlain unconformably by the Modelo which overlaps\r\nit to the west.
\r\n\r\nThe area has undergone several periods of rejuvenation\r\nduring Quaternary times, the uplift not being accompanied by\r\ntilting. Remnants of the old land surface and stream terraces at various levels indicate that before uplift the area was in late maturity of the physiographic cycle; now it is in a youthful stage of development.
\r\n\r\nThe main structural features are the Sespe overthrust,\r\nfolds trending northeast-southwest, and a well developed\r\nflow cleavage and shear joint system in the schist. Forces\r\nof a static nature have affected the area at one time, as\r\nshown by the flow cleavage in the schist, but the most recent, dominant force acting in the area is considered to be compressive, non-rotational, inclined below the horizontal, and acting in a southwest direction. Its attitude is approximately N10\u00b0E.
\r\n\r\nThe area investigated and herein described is situated in the northwestern part of Los Angeles County and in the southwestern part of the San Gabriel Mountains. It comprises the southern half of the Red Mountain Quadrangle, having as its eastern and western limits, 118\u00b030\u2019 and 118\u00b036\u2019 west longitude and as its northern and southern limits, latitudes of 34\u00b033\u2019 and 34\u00b030\u2019 respectively. The area mapped contains about twenty square miles. It is about forty-five miles north-west of Los Angeles and about nine miles north of Saugus. The area lies within the reserves of the Angeles National Forest.
\r\n\r\nThe area is easily reached by automobile, for there\r\nare excellent paved roads from all outlying districts which\r\nlead to Saugus. The main highway from Los Angeles to Saugus\r\nis U.S. 99, but there are others equally good. In addition\r\na branch of the Southern Pacific railroad passes through\r\nSaugus. The only unpaved road to be encountered is a good,\r\ngravel road in San Francisquito Canyon.
\r\n" }, { "name": "Allen, Richard Harvey", "degree": "Bachelors", "year": "1938", "title": "A Short Investigation of the North Central Portion of the Lang Quadrangle, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12172009-093630083", "creators": [ { "name": { "family": "Allen", "given": "Richard Harvey" }, "id": "Allen-Richard-Harvey", "display_name": "Allen, Richard Harvey" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/ZV4K-PR87", "abstract": "This paper consists of a study of the Escondido and Mint Canyon formations and their structural relationships in the Lang Quadrangle, California. The Escondido formation was found to be approximately 4,500 feet thick and folded into a large pitching syncline with a small anticline in the center. This large syncline, which is in fault contact with the basement, is further modified by a series 4 major strike-slip faults in which the east side has moved northwards. The structure of the Mint Canyon formation is that of a syncline of depositional origin lying in depositional contact on the Escondido and the basement. The Mint Canyon is also modified by one of the major strike-slip faults.
\r\n\r\nThe age determinations are not satisfactory where the Escondido and the basement are concerned. The basement is believed to be pre-Cretaceous; the Escondido is placed between the Eocene and the Upper Middle Miocene and is suspected to be Middle Miocene in age. The Mint Canyon formation is thought to be Upper-Middle Miocene and Lower Upper Miocene.
\r\n\r\n" }, { "name": "Carr, Robert Bradwell", "degree": "Bachelors", "year": "1938", "title": "The Geology of Sand Canyon, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12222009-151641990", "creators": [ { "name": { "family": "Carr", "given": "Robert Bradwell" }, "id": "Carr-Robert-Bradwell", "display_name": "Carr, Robert Bradwell" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/P7PV-JX50", "abstract": "Summary
\r\n\r\nA body of complexly segregated igneous rock has been intruded into sediments at an early period in the\r\nearth's history. The segregations include a dioritic phase and a magnetite-ilmenite bearing ore phase in the area discussed.
\r\n\r\nDuring much later times, the Miocene Mint Canyon formation was deposited on the west of the igneous body and in turn has been covered by old alluvium in places that has originated in the mountain block composed of the intrusion
\r\n\r\nEconomic Considerations
\r\n\r\nThe bodies of ilmenite bearing ore should be carefully sampled and assayed to determine the percentage of titanium that can be obtained from the ore. The bodies promise sufficient tonnage and accessibility to be developed economically wit a moderate titanium content that is not too variable.
" }, { "name": "Cowie, Roger Harrison", "degree": "Bachelors", "year": "1938", "title": "Geology of a Portion of the Ravenna Quadrangle, Los Angeles County", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12212009-135009078", "creators": [ { "name": { "family": "Cowie", "given": "Roger Harrison" }, "id": "Cowie-Roger-Harrison", "display_name": "Cowie, Roger Harrison" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/PR0E-MD33", "abstract": "The area investigated contains a section of coarse fanglomerates and basic lavas of middle Tertiary age. It is, as far as known, unfossiliferous. The sediments have been tilted so that they dip in general southwest. Underlying the sediments on the north is a quartz-syenite basement rock. Faulted up on the south is an anorthosite basement. There is a prominent fault with several thousand feet of strike-slip displacement trending NE-SW through the center of the area. There are a number of short faults and steeply plunging open folds which trend in general NE-SW." }, { "name": "Hayward, Russell Edward", "degree": "Bachelors", "year": "1938", "title": "A Report on the Structure, Stratigraphy and Fossil Content of a Small Portion of the San Gabriel Range", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12162009-093447673", "creators": [ { "name": { "family": "Hayward", "given": "Russell Edward" }, "id": "Hayward-Russell-Edward", "display_name": "Hayward, Russell Edward" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/W11T-AT96", "abstract": "The field work was done at a point some twenty miles to the southwest of Pasadena, California, from which city the spot may be reached by driving west on Foothill Boulevard to the town of Sunland, and there turning to the north. The area lies almost directly to the north of Sunland, and extends from slightly to the west of Ebbie Canyon approximately one-half mile to the west, and from the northern edge of the Tujunga Wash somewhat more than one mile to the north, thus forming a rectangle having\r\nnorth-south and east-west running borders. The total area\r\nis approximately three-fourths of one square mile.
\r\n\r\nThis paper was written to fulfill the requirements\r\nof the California Institute of Technology for the degree of\r\nBachelor of Science. Since the author is more interested\r\nin Paleontology than in Field Geology, this area was chosen\r\nbecause of the abundance of fossils in its northern section.\r\nThis particular small area was selected because it contains\r\na representative fossil assemblage, because there would be\r\nample time remaining after the completion of the field work\r\nproperly to prepare and identify the fossils collected, and\r\nbecause of its accessibility. It has been attempted to\r\nassign a definite age to those beds lying to the north of\r\nthe Sunland Fault through a correlation of the fossils of\r\nthis region with those of other adjacent areas, especially\r\nof the Santa Monica Mountains.
\r\n" }, { "name": "Knight, Jack William", "degree": "Bachelors", "year": "1938", "title": "Geology of a Portion of Piru and Santa Susana Quadrangles", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:01042010-085154304", "creators": [ { "name": { "family": "Knight", "given": "Jack William" }, "id": "Knight-Jack-William", "display_name": "Knight, Jack William" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/QQV0-2021", "abstract": "This area is situated adjoining the town of Piru, California, the area extending to the north and east of the town, in the northeast corner of the Piru quadrangle and the northwest corner of the Santa Susanna quadrangle. Piru is located on State highway 126 connecting the Ridge Route highway (U.S. 99) with the Coast (Roosevelt) Highway (U.S. 101) at Ventura. To reach Piru, travel from Los Angeles out Highway 99 to Castaic Junction, fifteen miles beyond San Fernando. Turn left on highway 126 and travel twelve miles to Piru. The southern extremity of the area borders on highway 126 and extends approximately from the Los Angeles-Ventura County border to Piru. All roads to Piru are well paved, except for one stretch just outside of Piru where a flood has washed out some two hundred yards of pavement.
\r\n\r\nThe area is shaped roughly like a trapezoid and contains\r\napproximately sixteen square miles. The boundary, beginning\r\nat Piru, extends east along highway 126 for approximately five miles, turns north for another four and one-half miles, turns west along Leckler and Santa Felicia canyons to Piru Creek, extends about one-half mile farther west, and then parallels Piru Creek down to Piru. The hills are sufficiently covered with grass to warrant several large ranches with quite a few live stock. Several bee colonies are cultivated here. All of the area is leased by the Pacific Western Oil Company, and written permission must be obtained before anyone is permitted to trespass in the area. There is one road running along the bank of Piru Creek that originally had several offshoots to different parts of the area and to ranches in the canyons, but\r\nnow the flood of March, 1938, has washed out all the side roads and nearly demolished the main road up the canyon.
\r\n" }, { "name": "Rynearson, Garn Arthur", "degree": "Bachelors", "year": "1938", "title": "Geology of the Fernando Pass Region", "advisor": "Maxson, John H.; Popenoe, Willis Parkison", "url": "https://resolver.caltech.edu/CaltechETD:etd-12022008-145829", "creators": [ { "name": { "family": "Rynearson", "given": "Garn Arthur" }, "id": "Rynearson-Garn-Arthur", "display_name": "Rynearson, Garn Arthur" } ], "advisors": [ { "name": { "family": "Maxson", "given": "John H." }, "id": "Maxson-J-H", "role": "advisor", "display_name": "Maxson, John H." }, { "name": { "family": "Popenoe", "given": "Willis Parkison" }, "id": "Popenoe-W-P", "role": "advisor", "display_name": "Popenoe, Willis Parkison" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/D34W-SF50", "abstract": "Location of area: The Fernando Pass region is located in the low pass between the San Fernando and upper Santa Clara Valleys, and southeast of the town of Newhall. The bounding meridians are Lat. 34\u00b0 16' - 34\u00b0 22' 45\" N. and Long 118\u00b0 28\u2019 - 118\u00b0 32' W. The area includes about thirty square miles and lies between the western end of the San Gabriel and the eastern end of the Santa Susana Mountains. It is bounded by Placerita Canyon on the north and the San Fernando Valley on the south. Refer to Fig. 1 for more general location.
\r\n\r\nPurpose of the work: The work was done in partial fulfillment of the requirements for the degree of Bachelor of Science at the California Institute of Technology. The essential purpose of the work was to gain a more detailed knowledge of the stratigraphic and structural relationships of the rocks in the region.
\r\n\r\nField work: The geology was plotted in the field on United States Geological Survey topographic maps. The rock exposures were traced on foot and locations were determined by topographic features and by Brunton Compass shots. Dips and strikes were carefully taken with the Brunton Compass and Clinometer. Four days preliminary work in the fall of 1937 and twenty-one days during the spring of 1938 were required to complete the field studies.
\r\n" }, { "name": "Smith, Clay Taylor", "degree": "Bachelors", "year": "1938", "title": "Geologic Report on a Portion of the Lang Quadrangle", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12232009-141608396", "creators": [ { "name": { "family": "Smith", "given": "Clay Taylor" }, "id": "Smith-Clay-Taylor", "display_name": "Smith, Clay Taylor" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/Y2M5-NT67", "abstract": "The area investigated in the Lang Quadrangle, California includes about seven square miles with desert vegetation and a maximum relief of about 1000 feet.
\r\n\r\nThe area consists of two formations separated by an angular unconformity of about 30 degrees, the Escondido tentatively placed in middle Miocene, and the Mint Canyon, either upper middle Miocene or lower upper Miocene. The Escondido formation consists of alternate beds of sandstones and shales and lava flows. The Mint Canyon formation is a series of sandstones, conglomerates, and coarse terrace gravels all of terrestial origin.
\r\n\r\nThe Escondido formation is folded into a tight pitching syncline with minor folds on it southern flank. A great deal of faulting has complicated the otherwise simple structure. The Mint Canyon formation is warped into a broad syncline and anticline which are almost exclusively depositional in origin. A great deal of minor faulting may be seen in this formation not to be correlated with that in the Escondido except in a few cases.
\r\n\r\nThe historical geology has been summarized on page 35.
\r\n\r\nThe economic deposits are unimportant and of no economic significance.
\r\n" }, { "name": "Watson, Samuel Eugene", "degree": "Bachelors", "year": "1938", "title": "Geology of the NE 1/4 of the Humphreys Quadrangle, Los Angeles County, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12232009-145035415", "creators": [ { "name": { "family": "Watson", "given": "Samuel Eugene" }, "id": "Watson-Samuel-Eugene", "display_name": "Watson, Samuel Eugene" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/051M-F135", "abstract": "The area discussed in this report lies in the southernmost part of the California Coast Ranges, directly northeast of the San Gabriel Mountains and north of the Santa Monica Mountains. The area mapped is the NE 1/4 of the Humphreys Quadrangle.
\r\n\r\nThe Humphreys Quadrangle, named after the station of Humphreys on the Southern Pacific Railroad in it's southern part, is located about 40 miles northwest of Los Angeles. It is in latitude 34\u00b030' N and longitude 118\u00b024' W. In the northern section is the southern part of the Sierra Pelona hills, rising to a height of a little over 2700 feet in the Angeles National Forest. The southern section contains the narrow flat valley of the Santa Clara River. The San Andreas fault runs along the south side of Hughes Lake, which is about 15 miles due north. A branch of the San Andreas ends close to the eastern boundary of this area.
\r\n\r\nIn the Humphreys Quadrangle, the area studied lies between Bouquet and Mint Canyons, including a portion of Mint Canyon, and also Vasquez and Texas Canyons. By way of Bouquet Canyon, it is approximately 8 miles from the town of Saugus. From Pasadena it may be reached by taking Foothill Blvd. through the San Fernando Valley to Newhall, and then to Saugus. The road to Mojave is taken from Saugus, and either the Mint Canyon or Bouquet Canyon roads lead directly into the area.
\r\n" }, { "name": "Legge, John Allan", "degree": "Bachelors", "year": "1937", "title": "Geology of a Northern Portion of the Sunland Quadrangle, Los Angeles County", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12162009-114251476", "creators": [ { "name": { "family": "Legge", "given": "John Allan" }, "id": "Legge-John-Allan", "display_name": "Legge, John Allan" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/MHJ4-HD20", "abstract": "The region between Little Tujunga Canyon and Akens Canyon is a region of Tertiary sedimentary and intrusive volcanic rocks. The sedimentary section is dominant and is represented by about 1500 feet of Modelo (Upper Miocene), 1600 feet of marine Pico (Lower Pliocene) resting upon the Modelo with slight unconformity, 2200 feet of continental Saugus (Upper Pliocene), and 100 to 200 feet of terrace gravels (Pleistocene).
\r\n\r\nStructurally the region consists of a large block tilted northward and bounded on the north by the Sierra Madre Fault and on the south by the hypothetical Tujunga Fault. Faulting is the dominant feature of the structure, the only important fold being the Merrick syncline which roughly parallels the Sierra Madre Fault.
\r\n" }, { "name": "Nolte, Claude Byron", "degree": "Bachelors", "year": "1937", "title": "Structure and Stratigraphy of a Portion of San Gabriel Foothills in the Northern Third of the Sunland Quadrangle, Los Angeles County, California", "advisor": "Bode, Francis D.", "url": "https://resolver.caltech.edu/CaltechTHESIS:12162009-093752725", "creators": [ { "name": { "family": "Nolte", "given": "Claude Byron" }, "id": "Nolte-Claude-Byron", "display_name": "Nolte, Claude Byron" } ], "advisors": [ { "name": { "family": "Bode", "given": "Francis D." }, "id": "Bode-F-D", "role": "advisor", "display_name": "Bode, Francis D." } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/CH9G-W502", "abstract": "The area is located in San Fernando Valley, California, northwest of the small town of Sunland. The area extends 2\u00bd miles eastward from Little Tujunga Canyon to Ebbie Canyon along the north side of Tujunga Wash and thence northward one mile up Ebbie Canyon to the basement complex; it extends 1\u00bd miles north-eastward from Tujunga Wash up Little Tujunga Canyon.
\r\n\r\nTo reach the area from Pasadena, drive 20 miles west from the center of town along Foothill Blvd. The center of the south side of the area lies at the point where Foothill Blvd. resumes its east-west direction after crossing Tujunga Wash, about 2 miles beyond Sunland.
\r\n\r\nThe area is a trapezium with the east side trending N 13\u00b0 E for 6000' from the mouth of Ebbie Canyon, the north side trends 10,000' N 56\u00b0 W, to Little Tujunga Canyon. The western side extends for 11,500' S 50\u00b0 W, while the south side runs 16,000' S 80 E back to Ebbie Canyon.
\r\n\r\nThe area of the trapezium is 2568 acres or 4.06 square miles. There is very little human culture in the region. Along the south side there is a fringe of orange groves with a road up Oliver and Schwartz Canyons to small ranches. In the north-west corner there is a ranch on the large Q.O.Al. terrace. A road runs up Ebbie Canyon to the granite complex. The Forestry Service is building a road near the northern boundary to extend westward from the\r\nupper end of Doan Canyon.
\r\n" }, { "name": "Park, Noel Robertson", "degree": "Bachelors", "year": "1937", "title": "Geology of the Puente Hills Region in the Puente Quadrangle", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12222009-155502675", "creators": [ { "name": { "family": "Park", "given": "Noel Robertson" }, "id": "Park-Noel-Robertson", "display_name": "Park, Noel Robertson" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/ESQ6-9F63", "abstract": "The area mapped is located in the portion of the Puente\r\nHills just east of the town of Puente. The problem was to\r\nmap the region shaded in brown on the index map. The area\r\nhatched in brown is the Puente Quadrangle, which is the map\r\nused.
\r\n\r\nGeographical names are vaguely defined in this part of\r\nSouthern California. The United States Geological Survey\r\nhas called the nearly isolated group of hills between Puente\r\nand the Pass and Covina Road, part of the Puente Hills, and\r\nthe large group of hills between this road and the city of\r\nPomona, the San Jose Hills. Other definitions will be omitted from this paper in order to avoid confusion, so the name Puente hills, as far as this region is concerned, applies only to the small cluster of hills mentioned above.
\r\n\r\nThe area chosen was bounded by the San Gabriel Valley\r\non the north, Puente Valley on the south, the east border\r\nof the Puente Quadrangle, and the town of Puente on the west. Field work was conducted in this three and one-half square miles plot for sixteen days, with the purpose being a structural field problem for a Bachelor's thesis at the California Institute of Technology. The base map, the Puente Quadrangle of the Unites States Geological Survey, edition of 1927, was excellent to work with, as the scale was 1:24,000, and the contour interval in the hilly country was twenty-five feet.
\r\n\r\nStrikes and dips, accurate in most cases to plus or\r\nminus three degrees, were obtained with a Brunton Compass.\r\nThe estimate does not account for the slumping of surface\r\noutcrops, nor does it apply to the attitude of poorly\r\nbedded outcrops. A few dip and strike readings do not\r\nfit in the general picture; nor can they be explained\r\nin any way other than mistakes or minor flexures.
\r\n\r\nAll of the contacts were traced as accurately as\r\nnatural conditions allowed. In the parts of the region\r\ndevoted to pasturage, the only hindrance to exact tracing of\r\nthe contact was cactus, as outcrops were abundant and most\r\nof the rock was in place. Unfortunately, much of the area\r\nwas under cultivation which removed all of the surface outcrops and destroyed any trace of the contact. The change\r\nbetween conglomerate and shale in these places could only\r\nbe determined to within two hundred feet.
\r\n" }, { "name": "Nelson, Loyal Edward", "degree": "Bachelors", "year": "1936", "title": "Geologic Studies in the Vicinity of Dry Canyon, Los Angeles County, California", "advisor": "Bode, Francis D.", "url": "https://resolver.caltech.edu/CaltechTHESIS:12222009-111648744", "creators": [ { "name": { "family": "Nelson", "given": "Loyal Edward" }, "id": "Nelson-Loyal-Edward", "display_name": "Nelson, Loyal Edward" } ], "advisors": [ { "name": { "family": "Bode", "given": "Francis D." }, "id": "Bode-F-D", "role": "advisor", "display_name": "Bode, Francis D." } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/YKY8-7N10", "abstract": "The area studied is located approximately 40 miles northwest of Pasadena, about 5 miles north of Saugus, and around Dry Canyon Reservoir. It covers about 3.5 square miles, extending from Haskell Canyon west to San Francisquito Canyon. This field problem was undertaken in partial fulfillment of the requirements for a Bachelor of Science Degree.
\r\n\r\nA Brunton compass and an enlarged portion (1\"-1000') of the Saugus Quadrangle were used in the mapping work. Though the region is one of moderate relief, good outcrops are few. This is perhaps principally due to the softness of the sediments.
\r\n\r\nA coordinate system is used to facilitate the location of specific points on the geologic map. Numerals are used to give east-west positions and letters are used on the north-south coordinate lines.
\r\n\r\nOnly sedimentary rocks are found in the field area. These have been divided into four formations which, beginning with the oldest, are the Mint Canyon, Dry Canyon, and Saugus formations, and Quaternary gravels. Unconformities separate each of these formations. The Mint\r\nCanyon formation is known to be of continental origin since remains of land vertebrates have been found in these strata. Marine fossils are found in the Dry Canyon formation. The Saugus formation and Quaternary gravels are very likely continental deposits.
\r\n\r\nIn general, the sedimentary beds have been gently deformed into fold structures whose axes trend in an E - W direction. Faulting may have accompanied the folding since several reverse types of faults were found. Later faulting of the Quaternary gravels also took place. A majority of the larger faults appear to be approximately parallel\r\nto the fold structures.
\r\n" }, { "name": "Dawson, Charles Alexander", "degree": "Bachelors", "year": "1935", "title": "The Geology of a Portion of the Mint Canyon Region", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12142009-143804395", "creators": [ { "name": { "family": "Dawson", "given": "Charles Alexander" }, "id": "Dawson-Charles-Alexander", "display_name": "Dawson, Charles Alexander" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/4SSV-C055", "abstract": "The region considered in this report is shown\r\non the north-west portion of the Lang Quadrangle, (Edition\r\nof 1933, scale 1/24,000) and the north-east portion of\r\nthe Humphreys Quadrangle, (Edition of 1932, scale 1/24,000).\r\nThe region is approximately 45 miles north of Los Angeles\r\nand therefore lies in the Coast Range Province. The area\r\nmapped is a portion of a synclinal basin extending east-west\r\nand lying between the San Gabriel Mountains to the\r\nsouth and the upthrown blocks bordering the San Andreas\r\nFault to the north. See map, fig. 1, page 2. On the map,\r\nthe San Andreas Fault is well indicated by a series of\r\nroads traveling in the fault-trough, shown in the upper\r\nright-hand portion joining Sandbergs and Palmdale.\r\n" }, { "name": "Evans, Milton Harrison", "degree": "Bachelors", "year": "1935", "title": "The Geology of a Portion of the Rand Mountains, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12142009-151140150", "creators": [ { "name": { "family": "Evans", "given": "Milton Harrison" }, "id": "Evans-Milton-Harrison", "display_name": "Evans, Milton Harrison" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/CC9G-KC62", "abstract": "The Rand Mountains form a small desert range lying about 150 miles northeast of Los Angeles, and 40 miles east of Mojave, California. The town of Randsburg, in the northeast part of the range, has been the center of considerable mining activity for the past 40 years. Approximately 40 million dollars in gold and silver have been taken from the mines of the district, chiefly from the famous Yellow Aster and California Rand mines. Despite the mining activities, however, practically no geologic work had been done in this district prior to 1924. In 1909, Hess (1) made a brief reconnaissance of the Randsburg district in which he noted the types of rooks in the Rand Mountains, their general structure, and the nature of the ore deposits. Hess' work remained the only significant study until 1924, when Hulin (2), under the direction of the California State Mining Bureau, made a detailed study of the entire Randsburg quadrangle, defining and mapping the formations, and studying the ore deposition in all the important mines of the quadrangle. It seemed to the writer, however, that the unusual rocks of the Rand Mountains merited a more detailed petrographic study than Hulin was able to make, and considerable time was spent during the spring of 1935 in a field and laboratory study of them.
\r\n\r\nThe Randsburg quadrangle lies between 117\u00b030\u2019 and 117\u00b045\u2019 east longitude, and 35\u00b015\u2019 and 35\u00b030\u2019 north latitude. It was surveyed in 1900 by the U. S. Geological Survey on a scale of 1/62500 with a contour interval of 50 feet. The Rand Mountains extend from near the center of the map southwest towards the western border. As a typical section for study, the writer chose a narrow area of about 5 square miles in the immediate vicinity of Randsburg.
\r\n" }, { "name": "Jahns, Richard Henry", "degree": "Bachelors", "year": "1935", "title": "Geology of the Ravenna Quadrangle", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:03172010-101510816", "creators": [ { "name": { "family": "Jahns", "given": "Richard Henry" }, "id": "Jahns-Richard-Henry", "display_name": "Jahns, Richard Henry" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/K1PV-N521", "abstract": "The Vasquez Series, composed of coarse fanglomerates, finer sandstones, and lavas, represents sub-areal deposition in the form of a series of rapidly coalescing alluvial fans. These fans were formed in a basin entirely local in character (confined to the Ravenna and Lang Quadrangles) which was probably caused by faulting, either in late Oligocene or very early Miocene time.
\r\n\r\nThe sediments are early or early middle Miocene in age, are very well consolidated, poorly sorted, and broadly stratified. They occur associated with intrusions of quartz diorite, syenite, and anorthosite, contacting these formations either depositionally or by means of faults.
\r\n\r\nThe lavas are of both intrusive and extrusive origin. The extrusive type is both vesicular and amygdaloidal, while the intrusive type is massive.
\r\n\r\nThe section is broken by two major fault systems. The older of these, trending northwest-southeast, is represented by normal faults, whose movement is primarily vertical, while the younger system, trending nearly at right angles to the other, consists of steep strike-slip faults.
" }, { "name": "Scherb, Ivan Victor", "degree": "Bachelors", "year": "1935", "title": "Geology of the Le Brun and Mint Canyon Quadrangles, California", "advisor": "Maxson, John H.", "url": "https://resolver.caltech.edu/CaltechTHESIS:12072009-140946030", "creators": [ { "name": { "family": "Scherb", "given": "Ivan Victor" }, "id": "Scherb-Ivan-Victor", "display_name": "Scherb, Ivan Victor" } ], "advisors": [ { "name": { "family": "Maxson", "given": "John H." }, "id": "Maxson-J-H", "role": "advisor", "display_name": "Maxson, John H." } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/RC5N-4B66", "abstract": "The Le Brun and Mint Canyon Quadrangles comprise an area of approximately fifty-two square miles. The northern\r\npart of the Le Brun Quadrangle is made up of three fundamental geologic units. Steeply dipping Tertiary sediments form a wedge, which narrows eastward, between an igneous complex to the north and a metamorphic series to the south. Three rock units are all bounded by steep, northerly dipping faults. The faulting is post-Oligocene and pre-Pleistocene in age. Everywhere the faults are truncated by an old land surface which is several stages removed from some of the more progressive land forms of the present cycle. The southern part of the Le Brun Quadrangle is composed largely of the metamorphic series which forms\r\nSierra Pelona Ridge.
\r\n\r\nIn the northern part of the Mint Canyon Quadrangle, the sedimentary wedge is terminated by a series of intersecting faults which persist to the eastern edge of the area and continue into the San Andreas Rift, several miles east of the boundary of the Mint Canyon Quadrangle. The central portion of the Mint Canyon Quadrangle is formed by the metamorphic series and is expressed topographically by Sierra Pelona Ridge. In the southern part of this quadrangle, an intricate system of faulted igneous and sedimentary beds are exposed. Easterly, this fault system disappears.
\r\n" }, { "name": "Judson, Jack Finlay", "degree": "Bachelors", "year": "1934", "title": "General Geology of Verdugo Mountains", "advisor": "Maxson, John H.", "url": "https://resolver.caltech.edu/CaltechTHESIS:12152009-111344951", "creators": [ { "name": { "family": "Judson", "given": "Jack Finlay" }, "id": "Judson-Jack-Finlay", "display_name": "Judson, Jack Finlay" } ], "advisors": [ { "name": { "family": "Maxson", "given": "John H." }, "id": "Maxson-J-H", "role": "advisor", "display_name": "Maxson, John H." } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/KFF4-5G61", "abstract": "The Verdugo Mountains is a horst bounded on the south and west by reverse faults and on the north by normal faults. These faults are not simple fractures, but are zones including a number of parallel faults. The Verdugo block is not a simple horst, however, but is a composite one, being divided into three main blocks by normal faults which belong to a later period than the reverse faulting. Structurally, the Verdugo Mountains is a part of the San Gabriel Range, and also should include the San Rafael Hills which are only separated from these mountains by Verdugo Canyon.
\r\n\r\nThe western part of these mountains is overlain by Miocene and Pliocene sediments folded into a number of small folds, which, however, are merely flexures on the south limb of an overturned syncline whose axis is across Tujunga Wash. These sediments are largely marine, although fan-glomerates make up a large part of these. The basal conglomerate has a basalt flow intercalated in it.
\r\n" }, { "name": "Sharp, Robert Phillip", "degree": "Bachelors", "year": "1934", "title": "Geology of the Tujunga region, Southwestern San Gabriel Mountains", "advisor": "Maxson, John H.", "url": "https://resolver.caltech.edu/CaltechTHESIS:04082010-130714281", "creators": [ { "name": { "family": "Sharp", "given": "Robert Phillip" }, "id": "Sharp-Robert-Phillip", "display_name": "Sharp, Robert Phillip" } ], "advisors": [ { "name": { "family": "Maxson", "given": "John H." }, "id": "Maxson-J-H", "role": "advisor", "display_name": "Maxson, John H." } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/6D8Y-3G83", "abstract": "The Tujunga area offers a wide variety of rocks,\r\nigneous plutonics, lavas, metamorphics, and Tertiary and\r\nQuaternary marine and terrestrial sediments from middle\r\nMiocene up to Recent in age. The entire span of all the\r\nrocks of the area ranges quite certainly from Jurassic\r\nup to Recent and possibly from Pre-Cambrian(?) up to\r\nRecent.
\r\n\r\nThe Tertiary sediments have all been deformed and are\r\nfolded into a medium large syncline, the Merrick Syncline,\r\nwith several smaller attendant folds. Faulting has uplifted\r\nthe underlying basement to the north. The Tertiary sediments\r\nabut sharply against this basement scarp.
\r\n\r\nThe faulting of the Tujunga area is of two types,\r\nreverse and normal, with the normal faulting being younger\r\nthan the reverse faulting. This idea differs from the\r\nideas generally held about the Tujunga area and is the\r\nmost important contribution of this paper. The faulting\r\nhas all occurred in late Pleistocene or Recent time and\r\nevidence of movements are fresh.
\r\n\r\nCollections and determinations of fossils from the\r\nso called Topanga of the Tujunga area have definitely\r\nfixed the age of this series of beds as middle Miocene.
\r\n" }, { "name": "Bonillas, Ygnacio, III", "degree": "Bachelors", "year": "1933", "title": "Geology of Tick Canyon", "advisor": "Maxson, John H.", "url": "https://resolver.caltech.edu/CaltechETD:etd-10092007-074254", "creators": [ { "name": { "family": "Bonillas", "given": "Ygnacio, III" }, "id": "Bonillas-Ygnacio-III", "display_name": "Bonillas, Ygnacio, III" } ], "advisors": [ { "name": { "family": "Maxson", "given": "John H." }, "id": "Maxson-J-H", "role": "advisor", "display_name": "Maxson, John H." } ], "committee": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "option_major": [ "geol" ], "doi": "10.7907/GCCT-S998", "abstract": "Tick Canyon lies in the north central portion of the Lang quadrangle, Los Angeles county, California. It is about twenty-five miles northwest from Pasadena as the crow flies, but fifty miles by the most direct roads. The area is easily reached by driving two miles east from the Mint Canyon highway on a road six miles north of the Santa Clara river.
\r\n\r\nApproximately three square miles were studied. The area is roughly rectangular, extending north and east of the head of Tick Canyon. The investigation was undertaken as a partial fulfillment of the requirement leading to the degree of Bachelor of Science at the California Institute of Technology. As a base map a Los Angeles county map surveyed in 1929 and published in 1933 was used. This has a scale of two-thousand feet to the inch and twenty-five foot contour intervals. It is very satisfactory and makes detailed work possible.
\r\n\r\nThe author wishes to acknowledge his indebtedness to\r\nDr. John H. Maxson of the Institute staff, and to thank him for his aid and for his fruitful suggestions, which have made the work possible.
\r\n\r\nThis region was previously described by Dr. William S.W.\r\nKew in Bulletin 753 (1924) of the United States Geological\r\nSurvey.
\r\n\r\nA description of the area was also published by Mr. O.H.\r\nHershey: Am. Geologist, vol. 29, pp. 356-358, 1902.
\r\n" }, { "name": "Franklin, Elmer Sherwood", "degree": "Bachelors", "year": "1933", "title": "Geology of the Haskell Canyon Region, Southern California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12112009-142926623", "creators": [ { "name": { "family": "Franklin", "given": "Elmer Sherwood" }, "id": "Franklin-Elmer-Sherwood", "display_name": "Franklin, Elmer Sherwood" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/0V5B-E733", "abstract": "The Haskell Canyon region, located in the northeast portion of Los Angeles County, California, occupies a rectangular block of approximately 10 square miles in area, the center of which is some 50 miles northwest of Los Angeles (Plate 1). The region may be described as that portion of the Sierra Pelona Mountains which occupies the area bounded by latitudes 118\u00b030' and 118\u00b027' and meridians 34\u00b032' and 34\u00b028'. The area mapped extends from Bouquet Canyon northward the length of Haskell Canyon, a distance of about 4\u00bd miles. It may be readily reached from Saugus, a small town (1\u00be miles to the southwest) on the main line of the Southern Pacific Railroad to San Francisco and on U.S.\r\nHighway Number 99. All parts of the area are readily accessible for numerous roads cut.\r\n" }, { "name": "Finney, Howard William", "degree": "Bachelors", "year": "1932", "title": "Geology of a Portion of the Santa Susanna Mountains, Los Angeles County, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12022009-143556044", "creators": [ { "name": { "family": "Finney", "given": "Howard William" }, "id": "Finney-Howard-William", "display_name": "Finney, Howard William" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/8N03-X572", "abstract": "The Santa Susanna Mountains lie to the west and north of the City of San Fernando, California. The mountains form the northwest boundary of the San Fernando Valley, which is separated from Los Angeles and its suburbs by the Santa Monica Mountains.
\r\n\r\nAbout five and one-half square miles of country were mapped, this area lying north-northeast of Santa Susanna Pass, at the northwest corner of San Fernando Valley. The valley is noted for its productive farm land. In the foothills of the Santa Susanna Mountains there are many week-end cabins, together with cattle ranches. Cattle are grazed principally on the Modelo Formation, which, because of its character, allows good grass to grow.
\r\n\r\nWhile there has been a little oil prospecting and drilling, no oil has been found in the area mapped. There are, however, good producing fields on the north side of the Santa Susanna Mountains.
\r\n" }, { "name": "Harshman, Elbert Nelson", "degree": "Bachelors", "year": "1932", "title": "The Geology of a Portion of Newhall and Sylmar Quadrangles, Los Angeles County, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12042009-134826911", "creators": [ { "name": { "family": "Harshman", "given": "Elbert Nelson" }, "id": "Harshman-Elbert-Nelson", "display_name": "Harshman, Elbert Nelson" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/5Q94-MX67", "abstract": "The area mapped includes nine and one-half square miles\r\nof the southeastern portion of the Newhall quadrangle and the southwestern portion of the Sylmar quadrangle, Los Angeles County, California. The work was done as partial fulfillment for the degree of Bachelor of Science at the California Institute of Technology.
\r\n\r\nThe area has been mapped before by W. S. W. Kew, whose\r\nwork will be found in U.S.G.S. Bull. 753. At that time, how\r\never, maps were of a scale of one mile to the inch, and field work could not be plotted with great accuracy. Recently Los Angeles County maps have been issued with a scale of two thousand feet to the inch, enabling the writer to plot the field data very accurately.
\r\n\r\nThe area mapped consists of sediments, and a metamorphic\r\ncomplex in which little was done. The sediments begin with\r\nthe Middle Miocene Modelo, and include the Pliocene Pico formation as well as the Pliocene-Pleistocene Saugus. The sediments consist conglomerates, sandstones, and shales. In\r\nareal extent the conglomerates are the most important, and\r\nthe shales the least, but economically the shales are more\r\nimportant as they serve as a source of oil.
\r\n\r\nThe dominant structures in the region are the late\r\nPleistocene folds, and the Sierra Madra fault of the same age. All structures trend in an east-west direction, although the fault makes a 45\u00b0 turn in this area, and after running, in a northeast-southwest direction for about five miles turns again and continues its east-west trend.
\r\n\r\nOil is found in the region, collected along the folds to the north and to the west of this area. There is a possibility of oil along the Pico anticline.
\r\n\r\nQuartz veins are present in the basement and may be of some economic value.
\r\n" }, { "name": "Reilly, James Thomas", "degree": "Bachelors", "year": "1932", "title": "A Report on the Geology of a Portion of Los Angeles County Located West of the City of Pasadena, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12102009-150538810", "creators": [ { "name": { "family": "Reilly", "given": "James Thomas" }, "id": "Reilly-James-Thomas", "display_name": "Reilly, James Thomas" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/3AP8-3K65", "abstract": "The area discussed in this report is located in Los Angeles County and lies partly within the city limits of Pasadena. The area extends from the Arroyo Seco on the east to a northsouth line about half a mile west of Eagle Rock, and from a eastwest line along the southern part of the San Rafael hills southward a distance of three to three and one half miles.
\r\n\r\nThe map used in the field work is a portion of the\r\nU.S.G.S. Altadena Quadrangle with scale 1/24000 and\r\nvertical contour interval five and twenty five feet.\r\nThis map was found to be unusually accurate topographically.
\r\n\r\nThe purpose of this paper is to report the results\r\nof a general geological survey of the area outlined\r\nabove. The usual brunton compass was used for field location. Locations are not indicated by numbers on the\r\nmap as it was found more convenient in the field work\r\nto refer to specific points by their distances and directions from street intersections.
\r\n\r\nThe extreme northern portion of the area is covered\r\nwith thick brush. All the other parts of the area are covered with grass or in the more hilly portions, with a light brush covering. The lowest point in the area (located in the south central part) has an elevation of approximately 550 feet while the highest point (located in the extreme northwestern portion) has an elevation of approximately 1,400 feet, giving a total relief of 850 feet.
\r\n" }, { "name": "Bolles, Lawrence William", "degree": "Bachelors", "year": "1931", "title": "The Geology of a Portion of the Redlands Quadrangle, California : a Study in Faulting", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12032009-110222995", "creators": [ { "name": { "family": "Bolles", "given": "Lawrence William" }, "id": "Bolles-Lawrence-William", "display_name": "Bolles, Lawrence William" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/3MY6-7E78", "abstract": "The San Andreas Rift after passing through the Cajon\r\nPass in Southern California proceeds approximately S 60\u00b0 E\r\nalong the base of the San Bernardino Mountains which rise\r\nto the north. About eight miles east of the city of Redlands, \r\nMill Creek issues from the San Bernardino Mountains south-west on to the alluvium covered flood plain. Four miles to \r\nthe west the Santa Ana River cuts north and south through \r\nthe crystalline rock. These two streams roughly mark the \r\neast and west boundaries of the area studied. The southern \r\nboundary is in reality the San Andreas Rift although the \r\nedge of the Crafton Hills is shown. The northern boundary \r\nis the Mission Creek Fault which is followed by Mill Creek \r\nas far west as the north-east corner of the geologic map \r\nshown in this report.
\r\n\r\nThe area studied covers approximately fifteen square miles in area. The maximum variation in elevation is about 2500 feet.
\r\n\r\nThe area was chosen to be studied for several reasons.\r\nThe foremost reason was because the region was most ideal\r\nfor the study of faulting. The area contains thirteen mapped\r\nfaults, large, small, normal, overthrusts, old, and recent.\r\nSix formations could be studied and research could be done\r\non a comparatively unexplored area. The author also made\r\na very prolonged search for fossil material in the Potato\r\nSandstone, a formation whose age is only known roughly from\r\npaleobotanical evidence. This portion of the research was\r\ndoomed to failure but the study of the region opened up so many problems of great geological interest that the author has never had occasion to regret in the least the time spent.
\r\n" }, { "name": "Cogen, William Maurice", "degree": "Bachelors", "year": "1931", "title": "Geology of a Part of the Southwestern Portion of the San Gabriel Mountains", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12142009-144520602", "creators": [ { "name": { "family": "Cogen", "given": "William Maurice" }, "id": "Cogen-William-Maurice", "display_name": "Cogen, William Maurice" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/BFQX-F624", "abstract": "The region is in the southwestern portion of the San Gabriel Mountains, north of Los Angeles, California.
\r\n\r\nStratigraphically it is composed of a section of Neogene rocks with some up-faulted older rock. The normal sequence as represented here is: Upper Modelo, unconformity; Pico, conformity; Saugus, angular unconformity; Quaternary terraces. The basement rock, composed largely of para-gneiss, schist and intrusive granite, has been faulted up from below. Its age is pre-Miocene, possibly pre-Jurassic.
\r\n\r\nThe structure of the region is characterized by faults of the dip-slip vertical or steeply normal type.
\r\n\r\nGeologically the history of the region is: invasion of the sea during Miocene time, deposition of the Modelo formation, broad uplift and subsequent denudation; faulting at the opening of the Pliocene, a second incursion of the sea, deposition of the Pico formation; orogenesis north of the region here described followed by withdrawal of the sea in Upper-Pliocene time, deposition of the Saugus formation (Piedmont Deposit); active faulting and orogenesis at the close of the Pliocene; continuous erosion with short resting stages during the Quaternary.
\r\n" }, { "name": "Holzman, Benjamin", "degree": "Bachelors", "year": "1931", "title": "The Geology of a Portion of the Santa Monica Mountains with a Section on Rock Cleavage", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12042009-112117808", "creators": [ { "name": { "family": "Holzman", "given": "Benjamin" }, "id": "Holzman-Benjamin", "display_name": "Holzman, Benjamin" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/F7AR-X817", "abstract": "A section of the Santa Monica Mountains lying in the eastern third of the Reseda Quadrangle and a portion of the western third of the Van Nuys Quadrangle comprises the geological mapping investigated by this report. The occurrence of a very thick section of pre-Jurassic metamorphic sediment interested the writer to make a study of the rock fracture and cleavage as presented by this section, and the latter part of this report shall be devoted to the results of this study. R. Peterson and the writer chose adjacent areas so as to be able to present a clearer concept of the geologic history of the region. The investigation was carried on in connection with the Senior Problem Course at the California Institute of Technology.
\r\n\r\nThe area can easily be reached by automobile by way of Ventura Boulevard or Mulholland Highway.
\r\n" }, { "name": "Peterson, Raymond Alfred", "degree": "Bachelors", "year": "1931", "title": "Geology of a Portion of the Santa Monica Mountains", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12022009-112321773", "creators": [ { "name": { "family": "Peterson", "given": "Raymond Alfred" }, "id": "Peterson-Raymond-Alfred", "display_name": "Peterson, Raymond Alfred" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/1Q7M-3129", "abstract": "The area discussed in this report lies on the north side\r\nof the Santa Monica Mountains, bordering on the San Fernando\r\nValley. It includes the region around the Encino Country Club and Encino Reservoir, and extends from Ventura Boulevard on the North to a short distance south of Mulholland Highway. The accompanying sketch map shows the location of the area, and its relation to the major features of Southern California. It is easily accessible from Los Angeles or Pasadena by Ventura Boulevard or Mulholland Highway.
\r\n\r\nVery excellent Los Angeles County maps (2,000 feet to the inch, 25 ft. C.I.) are available for the region, in the form of the U.S.G.S. Van Nuys and Reseda quadrangles. Fairchild Aerial Surveys of Los Angeles have also made a mosaic aerial map of this locality and the remainder of the Santa Monica. Mountains. The mapping for this report was done entirely on the aerial map, which proved highly satisfactory, allowing contacts and other features to be located very accurately. The scale used was 1500 feet to the inch.
\r\n\r\nMapping was made difficult by several features. Most of\r\nthe region is covered by very heavy brush, which is all but\r\nimpassable. Accurate mapping is very slow and laborious. In\r\nthe valley north of the Encino Country Club, contact and exposures are largely covered by alluvium, making exact mapping impossible. Also this fact coupled with the similarity in lithology between parts of the Modelo and Topanga formations makes it difficult to find the Modelo-Topanga contact. One helpful feature is that the Modelo is usually free from brush and covered by grass, which greatly facilitates mapping. An attempt was made to map a small area accurately rather than a larger one roughly. Hence the map represents only an area about three miles square, and of this the mapping west of the eastern border of the Encino Reservoir by Holzman. Also the mapping of the Modelo-Topanga contact was done jointly with Holzman.
\r\n\r\nPart of this area was included in Kew' s report, U.S.G.S. Bul. 753. Also the area is included in Hoot's report on the Santa Monica Mountains, now in press as a U.S.G.S. bulletin. The mapping of this report seems to agree in larger details with that of Hoots, but differs slightly from that of Kew as brought out later. This area overlaps in part that covered in Scharf's Senior Thesis. The area to the west has been mapped by Holzman, and that south by Crossman.
\r\n" }, { "name": "Hodder, Roland Frederick", "degree": "Bachelors", "year": "1930", "title": "A Report on the Geology of a Portion of the Whittier Hills Between Turnbull and La Habra Canyons", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12022009-145259186", "creators": [ { "name": { "family": "Hodder", "given": "Roland Frederick" }, "id": "Hodder-Roland-Frederick", "display_name": "Hodder, Roland Frederick" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/Z95D8Q2H", "abstract": "The rocks of the Tertiary described in this report are in the Puente Hills which are just south of the town of Puente, southeast from the town of El Monte, north of the town of Whittier, and approximately thirteen miles in a southeasternly direction from Los Angeles. The area investigated lies between Turnbull Canyon Road on the west and Hudson Avenue on the east.
\r\n\r\nThe maps which cover this district are the Los Angeles\r\nCounty maps, La Habra and Whittier Quadrangles. The scale is\r\n1/2400, and the contour interval is five and twenty-five feet. The maps are accurate and adequate in every detail.
\r\n" }, { "name": "Kuhn, Truman Howard", "degree": "Bachelors", "year": "1930", "title": "Geology of the Eastern Part of the San Jose Hills, Southern California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12022009-141145229", "creators": [ { "name": { "family": "Kuhn", "given": "Truman Howard" }, "id": "Kuhn-Truman-Howard", "display_name": "Kuhn, Truman Howard" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/REJW-1J59", "abstract": "The area described in this report occupies an irregular\r\nblock comprising approximately thirteen square miles, the\r\ncenter of which is about 22 miles south east of the center\r\nof the city of Pasadena (see Fig. 1). The hills which make\r\nup this area are known as the San Jose Hills. They extend\r\nfrom Puente on the south west to Pomona on the north east.\r\nThe area covered extends from Ganesha Park in Pomona to a\r\npoint slightly south east of the town of Covina. This area\r\ncan be found on the Covina and Claremont Quadrangles as\r\nsurveyed by the Los Angeles County.\r\n" }, { "name": "Wilson, Robert Warren", "degree": "Bachelors", "year": "1930", "title": "The Geology of a Portion of the Repetto Hills", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12032009-111148185", "creators": [ { "name": { "family": "Wilson", "given": "Robert Warren" }, "id": "Wilson-Robert-Warren", "display_name": "Wilson, Robert Warren" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/ZCSR-3P86", "abstract": "The area under consideration is located in what is known as the Rapetto Hills. It is located in the city limits of Los Angeles, and may be reached by going out North Broadway to Mission Road. From Pasadena the area is reached by way of Huntington Boulevard. The area is approximately six square miles in size. The base maps used were taken from the Alhambra, Los Angeles, Altadena, and Glendale sheets.
\r\n\r\nIn parts of the area it is quite solidly built up with homes, in other parts a little farming is attempted, mostly of barley and oats. Some of the homes, especially in the northern part are very nice, but the majority of them evidently belong to a very poor class of people. Lincoln High School is located in the extreme western part of the area near the intersection of North Broadway with Mission Road.
\r\n\r\nThe purpose of the investigation was to determine the geological formations and structure of a limited area in order to prepare a senior thesis as a partial fulfillment of the requirements for graduation.
\r\n\r\nThe base maps used were excellent Los Angeles County ones, with a scale of 2000 feet to the inch. Locations of outcrops, contacts, and the like were chiefly by topography, but in some cases the Brunton compass was used for purposes of location. The work was carried out completely on foot as a car was not available for the author. The nature of the country was such that it was extremely difficult to walk the contacts, and it was necessary to rely on roadcuts almost exclusively.
\r\n\r\nThere has been several previous reports issued on this area. One of these is U.S.G.S. Bulletin 309. This bulletin\r\nonly shows the geology in a very rough way, and is more of a hinderance than a help. Eaton has also issued in the \"Bulletin of the American Association of Petroleum Geologists\" a paper on the \"Geology of the Los Angeles Basin\". This deals with the geology of the area which was undertaken in an even rougher manner than Bulletin 309. When the field work was nearing a close the author found out that C.L. Gazin, J.W. Daly, and M.H. Sperling, of the Institute, had previously mapped most of the area undertaken. Reference to Gazin's paper was made in order to use the same formational names, and thus avoid needless confusion. The paper by Daly and Sperling has not been examined by the author.
\r\n" }, { "name": "Daly, John Warlaumont", "degree": "Bachelors", "year": "1929", "title": "The Geology of Mount Washington", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12032009-111820140", "creators": [ { "name": { "family": "Daly", "given": "John Warlaumont" }, "id": "Daly-John-Warlaumont", "display_name": "Daly, John Warlaumont" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/MAXF-6P84", "abstract": "The scope of this report embodies the work done in an area of six and a half square miles in extent, which lies between the northern portion of Los Angeles and Highland Park, more specifically it is bounded on the north by the 34\u00b007' parallel of latitude, on the south by the 34\u00b05'30\" parallel of latitude, on the west by the 118\u00b014' meridian of longitude, and on the east by the 118\u00b012' meridian of longitude. The United States Geological Survey have made excellent topographic maps of this area on the scale of 1/24,000 with a contour interval of 25 feet on the more prominent topography and 5 foot contours on the more subdued portions. The area is covered by the southeast corner of the Glendale Quadrangle and the northeast corner of the Los Angeles Quadrangle.
\r\n\r\nMount Washington is easily reached from any of the near by cities, Los Angeles, Pasadena, Glendale, Alhambra, by excellent paved highways. Not only do good highways lead to these hills but nearly all points in this region are accessible by automobile roads.
\r\n" }, { "name": "Lohman, Stanley William", "degree": "Bachelors", "year": "1929", "title": "A Report on the Geology of a Portion of the Whittier Hills, Southern California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12042009-101208669", "creators": [ { "name": { "family": "Lohman", "given": "Stanley William" }, "id": "Lohman-Stanley-William", "display_name": "Lohman, Stanley William" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/RJ6Y-3235", "abstract": "The area described in this report occupies a block of approximately 20 square miles, the northwest corner of which is 10 miles east of the center of Los Angeles. (See Figure 1) The southwest corner of the area is occupied by the city of Whittier. The area is situated at the intersection of four quadrangles, including the southeast corner of the El Monte Quadrangle, the southwest corner of the Puente Quadrangle, the northwest corner of the La Habra Quadrangle, and the northeast corner of the Whittier Quadrangle. Most of the area is occupied by the Whittier Hills which form the northwest corner of the Puente Hills. The rest includes portions of the San Gabriel Valley and the coastal plain.
\r\n\r\nThis piece of work was undertaken as a thesis problem at the California Institute of Technology in partial fulfillment of the requirements for the degree of Bachelor of Science. It was originally intended to be highly detailed, but because of the size and complexity of the area it was found necessary to confine most of the attention to the broader geological features.
\r\n\r\nTwenty-five days were spent in the field during the period from early January to June, 1929. A small fraction of this time was devoted to general reconnaissance, but most of the time was spent in mapping areal geology. This amount of time was quite inadequate for a thorough understanding of the problem, for many of the conditions encountered are subject to more than one interpretation.
\r\n\r\nThe field map used was made from portions of four U.S.G.S. topographic maps covering the above mentioned quadrangles. Fortunately all of these maps have a scale of 1/24000, with 5 and 25 foot contour intervals. This made location by topography relatively easy, for the maps are very accurately made. Locations for plotting data were determined by Brunton Compass sights, by aneroid barometer readings, and by topography, in varied combinations.
\r\n" }, { "name": "Sperling, Milton Heyer", "degree": "Bachelors", "year": "1929", "title": "The Geology of the Southeastern Portion of the Glendale Quadrangle and the Northeastern Portion of the Los Angeles Quadrangle", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12072009-141626638", "creators": [ { "name": { "family": "Sperling", "given": "Milton Heyer" }, "id": "Sperling-Milton-Heyer", "display_name": "Sperling, Milton Heyer" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/99YT-TX53", "abstract": "The area described in this report is that part of the\r\nGlendale and Los Angeles Quadrangles bounded on the north by York Boulevard, on the west by the Los Angeles River, and on the south by North Broadway. This area is about six square miles. The maps used are the U.S.G.S. sheets of recent publication which have a scale of 2000 feet to the inch. The contour interval is 5 feet up to elevations of 500\r\nand then it is 25 feet. The map is very satisfactory and is up to date except for very recent streets and buildings.
\r\n\r\nThis area was included in Ralph Arnold's report, U.S.G.S. Bulletin 103, on the Los Angeles Oil fields. However, his report was only of a reconnaissance nature and was made on a map with a scale of one inch to the mile. Hence very little of the detailed structure of this area\r\nwas shown. In 1928 Hampton Smith of the California Institute of Technology did some work of a detailed nature, but no finished report was made. The hills to the east of the Southern part of this area, lying in the Alhambra Quadrangle, were works of Mr. Lewis Gazin of the California\r\nInstitute of Technology. His report was accessible to the writer, and consequently, as some of the same formations occur in both areas, the writer has used the same names for the formations as are used in Mr. Gazin's report.
\r\n\r\nThe writer and his classmate, John Daly worked together, in doing the field work, however each kept separate complete notes and maps in order to make independent reports. The writer benefited from many\r\ndiscussions which arose over the questionable parts of the area. He is also indebted to Dr. J. P. Buwalda for many suggestions on the execution of the work.
\r\n\r\nThe geological mapping was carried on with the aid of a\r\nBrunton compass. The mapping of locations was facilitated by the fact that the numerous streets and roads in the area are almost all shown on the map and are easily recognizable.
\r\n\r\nThe problem was worked with a view toward mapping the aerial extent of the formations, deciphering thus underground and geological history. The area was worked in as much detail as the map scale and the available time permitted.
\r\n\r\nThe evidence of the underground structure was principally obtained from the numerous road cuts existing in most of the area. Natural exposures, due to erosion, are not plentiful, but are the only ones present in certain localities. The numerous buildings and retaining walls\r\nalso hindered the collecting of data.
\r\n" }, { "name": "Sutherland, John Clark", "degree": "Bachelors", "year": "1929", "title": "The Santa Susana Thrust Fault and its Related Problems: a Progress Report", "advisor": "Buwalda, John P.", "url": "https://resolver.caltech.edu/CaltechTHESIS:12152009-112122931", "creators": [ { "name": { "family": "Sutherland", "given": "John Clark" }, "id": "Sutherland-John-Clark", "display_name": "Sutherland, John Clark" } ], "advisors": [ { "name": { "family": "Buwalda", "given": "John P." }, "id": "Buwalda-J-P", "role": "advisor", "display_name": "Buwalda, John P." } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/BSKP-3P23", "abstract": "No abstract.\r\n" }, { "name": "Taylor, George Frederic", "degree": "Bachelors", "year": "1929", "title": "Geology of a Portion of the Eastern Santa Monica Mountains", "advisor": "Buwalda, John P.", "url": "https://resolver.caltech.edu/CaltechTHESIS:12232009-080457016", "creators": [ { "name": { "family": "Taylor", "given": "George Frederic" }, "id": "Taylor-George-Frederic", "display_name": "Taylor, George Frederic" } ], "advisors": [ { "name": { "family": "Buwalda", "given": "John P." }, "id": "Buwalda-J-P", "role": "advisor", "display_name": "Buwalda, John P." } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/2F8R-Q093", "abstract": "The area described in this report is located in the Santa Monica Mountains about 15 miles west of the center of Los Angeles. Beverly Boulevard and Mulholland Drive running east and west and several roads running north and south make most of the area immediately accessible by automobile. Subdivision roads on the lower slopes of the mountains near Beverly Boulevard offer numerous cuts that are very valuable in exposing formations. Fire breaks on the ridges and trails in many places on the hillsides offer convenient means of travel on foot, although exceptionally heavy brush makes travel off of the trails very difficult and at times impossible. The canyons are very steep sided and often make contact tracing most trying.
\r\n\r\nThe Sawtelle, Topanga Canyon, Van Nuys and Reseda quadrangles of the U.S. Geol. Survey formed the base map for the area and were supplemented by aerial photographs kindly furnished the writer by the Fairchild Aerial Survey. The total area mapped is about 25 square miles.
\r\n\r\nConsiderably more area was covered in the field work than was the original intention of the writer; as a result\r\nmapping is more detailed in some parts than others. In the vicinity of Mandeville Canyon, Rustic Canyon and Brown Canyon rather careful field work was done, but in the other parts of the area the work was of a hasty nature. Twenty-five days were spent in the field in all and at least the first ten of these were occupied in getting the general \"lay of the land\".
\r\n" }, { "name": "Bell, Frank Wagner", "degree": "Bachelors", "year": "1928", "title": "Report on the Geology of the San Pedro Hills", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12112009-142318813", "creators": [ { "name": { "family": "Bell", "given": "Frank Wagner" }, "id": "Bell-Frank-Wagner", "display_name": "Bell, Frank Wagner" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/5T7M-2E56", "abstract": "The San Pedro Hills Area is composed of Basement Complex overlain by a series of late Tertiary and Quaternary marine sediments. There is a series of intrusive rocks forming sills and laccolithic masses in the vicinity of San Pedro Hill.
\r\n\r\nThere is a great abundance of fossil material in the very late Tertiary and Quaternary beds, offering ample opportunity for the paleontologist to accurately zone the different formations.
\r\n\r\nThe folding is quite acute, but there has been no important faulting in the area.
" }, { "name": "Compton, Thomas H.", "degree": "Bachelors", "year": "1928", "title": "Geology of the Jawbone Canyon Region, Kern County, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12102009-145533959", "creators": [ { "name": { "family": "Compton", "given": "Thomas H." }, "id": "Compton-Thomas-H", "display_name": "Compton, Thomas H." } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/VY29-J716", "abstract": "The oldest known rocks in this region are the Paleozoic metamorphics. Next in age, thought to be Mesozoic, are\r\nthe granite basement complex rocks. These basement rocks furnished the materials of which the Ricardo sandstones and\r\nconglomerates are composed and subsequently the material for the o1d alluvial deposits. Following the deposition\r\nof the alluvium there was a period of deformation during which the granites were uplifted and dissection of the \r\nalluvial material and the tilted Ricardo beds set in.\r\n" }, { "name": "Hookway, Lozell Charlie", "degree": "Bachelors", "year": "1928", "title": "Geology of the Southwestern Part of the El Paso Mountains in the Region of Red Rock Canyon, Mojave Desert", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12072009-140303155", "creators": [ { "name": { "family": "Hookway", "given": "Lozell Charlie" }, "id": "Hookway-Lozell-Charlie", "display_name": "Hookway, Lozell Charlie" }, { "name": { "family": "Clark", "given": "Alexander" }, "id": "Clark-Alexander", "display_name": "Clark, Alexander" }, { "name": { "family": "Beverly", "given": "Burt Jr." }, "id": "Beverly-Burt-Jr", "display_name": "Beverly, Burt Jr." } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/SFW6-M150", "abstract": "The area described in this report includes the extreme south western portion of the El Paso range which lies in the northern part of the Mojave desert and takes in the area in and about Red Rock Canyon. The purpose of this report is to show the areal geology and structural relations existing. Those engaged in this work were L.C. Hookway, Alex Clark and the writer. Regular trips were made to the field during the academic year of 1927 - 1928. Altogether about two months were spent in the field.\r\n" }, { "name": "Joujon-Roche, Jean Edward", "degree": "Bachelors", "year": "1928", "title": "A Geological Report on a Small Part of the Santa Monica Mountains", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12022009-113357345", "creators": [ { "name": { "family": "Joujon-Roche", "given": "Jean Edward" }, "id": "Joujon-Roche-Jean-Edward", "display_name": "Joujon-Roche, Jean Edward" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/6DP1-JD32", "abstract": "No abstract." }, { "name": "Schroter, G. Austin", "degree": "Bachelors", "year": "1928", "title": "Geology of a Portion of the Tehachapi Mountains in the Vicinity of Jawbone Canyon, California", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12042009-100300063", "creators": [ { "name": { "family": "Schroter", "given": "G. Austin" }, "id": "Schroter-G-Austin", "display_name": "Schroter, G. Austin" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/VG84-YH26", "abstract": "The region embraced within this report lies in the West central part of Kern County, California, about twenty miles North and East of the little railroad town of Mohave. It is approximately 138 miles due North of Los Angeles, and may easily be reached by good road via the Midland Trail.
\r\n\r\nThe area comprises about 45 square miles in the Eastern portion of the Tehachapi Mountains, and is roughly bissected by Jawbone Canyon which trend's almost due East and West.
\r\n\r\nWith respect to other great geographic divisions of the Western United States, the area covered lies in the Western portion of the Great Basin province.
\r\n\r\nNorth of the town of Mohave, the Tehachapi Mountains trend about N. 40\u00b0 E., and continue in their Eastward extension until they join the El Paso range.
\r\n\r\nConsidered in a broad way, the Eastern portion of the Jawbone Canyon area consists of the flat floor of the Mojave Desert. The floor of the desert is abruptly terminated by the Tehachapi Mountains, and from here Westward, the region is made up chiefly of naked hills and deep canyons.
\r\n\r\nThe trip to Jawbone Canyon by automobile can easily be made in about four hours, from Los Angeles.
\r\n\r\nWithin five miles of the mouth of Jawbone Canyon, lies the Owenyo branch of the Southern Pacific Railroad.
\r\n\r\nAll of the area above described lies entirely within the Mojave Quadrangle of the United States Geological Survey.
\r\n" }, { "name": "Smith, Hampton", "degree": "Bachelors", "year": "1928", "title": "The Geology of a Portion of the San Pedro Hills", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12042009-151029624", "creators": [ { "name": { "family": "Smith", "given": "Hampton" }, "id": "Smith-Hampton", "display_name": "Smith, Hampton" }, { "name": { "family": "Bell", "given": "Frank Wagner" }, "id": "Bell-Frank-Wagner", "display_name": "Bell, Frank Wagner" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/QFX4-YB08", "abstract": "The San Pedro Hills represent a line of heights adjacent to the sea coast, and extending in a northwesterly direction\r\nfrom the town of San Pedro to Santa Monica Bay, a distance of about ten miles. The width of the hills is about four\r\nmiles. The highest point is San Pedro Hill, which rises to an elevation of 1480 feet.
\r\n\r\nThe area investigated by this survey comprises about the eastern half of these Hills, and includes about twenty\r\nsquare miles. Most of this territory is included in the \"San Pedro Hills'\" quadrangle, but the eastern quarter of it\r\nlies in the \"Wilmington\" quadrangle. The town of San Pedro covers a portion of the eastern third of the area, and the\r\nconsequent cultivation there renders mapping rather difficult, although several road cuts and excavations expose some excellent sections. The remainder of the area is more or less free from habitations, except for some ranches devoted to the cultivation of beans and hay. The exposures are as a whole rather poor, except inroad cuts and on canyon walls. The area is well cut up by good roads, and an automobile can be used to advantage in mapping.
\r\n\r\nPractically the only work published on this area was done by Ralph Arnold, whose work, included the paleontological study of Dead Man's Island, and a section along the west shore of San Pedro Bay. Arnold's work, though now questioned by later investigators, has been accepted by the writer in the age determination of the different formations.
\r\n\r\nThe survey made by the writer and Mr Bell, as a senior thesis for the California Institute, was done during the winter of 1927 and the spring of 1928, and included the mapping of the formations as defined by Arnold, and an investigation of the structure and physiography of the area. The paleontological work done by this survey was limited to an investigation of the foraminifera from Timm's Point.
\r\n" }, { "name": "Gazin, Charles Lewis", "degree": "Bachelors", "year": "1927", "title": "The Geology of the Northwestern Portion of the Alhambra Quadrangle", "advisor": "Unknown, Unknown", "url": "https://resolver.caltech.edu/CaltechTHESIS:12142009-133110292", "creators": [ { "name": { "family": "Gazin", "given": "Charles Lewis" }, "id": "Gazin-Charles-Lewis", "display_name": "Gazin, Charles Lewis" } ], "advisors": [ { "name": { "family": "Unknown", "given": "Unknown" }, "display_name": "Unknown, Unknown" } ], "committee": [ { "name": { "family": "None", "given": "None" }, "display_name": "None, None" } ], "option_major": [ "geol" ], "doi": "10.7907/Q22T-KT14", "abstract": "The region considered lies between the principal sections of Los Angeles and Alhambra, more strictly it is bounded on the north by the 34\u00b006' parallel, or about the southern limit of south Pasadena, on the west by the 118\u00b012\u2019 meridian, on the south approximately by an extension of Garvey Avenue, and on the east by Fremont Avenue. The area included is about nine square miles. The map used is the Alhambra Quadrangle recently published by the U.S.G.S. The scale of the map is 2000 feet to the inch and the contour interval is 5 feet up to the 500 foot level and above this the interval is 25 feet. The map is quite satisfactory except that the variation in contour interval gives the hilltops an unnatural aspect.
\r\n\r\nThe problem was attacked by making a general study of the region with an eye toward becoming familiar with the different materials that were to be encountered, always recording dip, strike, locality, remarks and materials that were studied. The areal map was next constructed by using the principal sandstone as a key bed and correlating the structure of the formations above and below to the structure indicated by this sandstone. The boundaries of the Quarternary alluvium were located principally on the basis of change of slope.
\r\n\r\nThe exposures of underground structure in the area are all good and consist principally of road cuts and other artificial excavations. However, in many places natural outcrops as a result of erosion were of considerable value. Also, another somewhat unique circumstance facilitated the problem. Along the northern boundary of the southern branch of the El Sereno sandstones just above Ascot Park and extending to Alhambra Boulevard, the marked contrast in weeds and grasses on either side of the contact between shale on the north and sandstone on the south made it possible to trace the contact with great ease, the accuracy of the procedure being born out here and there by good exposures. The grass in the shale consisted principally of wild barley, etc. In the sandstone in addition to wild barley there was a fairly dense growth of wild mustard. The nearer to the contact the more dense was this growth; also, scattered here and there were cactus plants. No cactus was observed in the shale. Further investigation showed that the sands near the contact were more moist than the shale on the other side. It was also noted that the character of the surface soil was highly indicative of underground material; for example, the shale surf ace after a rain and then a couple of hot days became hard, compact, and cracked, but the sand surface did not crack and remained loose. The capillary action between the sands and ground water, and the compactness of the clay shales account for the contrast in vegetation. It was only in the hills that this feature was observed because of the thinness and \"in situ\" character of the soil.
\r\n" } ]