Citation
Engel, Rene (1933) Geology of the Lake Elsinore Quadrangle, California and Mineral Deposits of Lake Elsinore Quadrangle, California. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/9QJ4-QD46. https://resolver.caltech.edu/CaltechTHESIS:07012013-154748332
Abstract
The Lake Elsinore quadrangle covers about 250 square miles and includes parts of the southwest margin of the Perris Block, the Elsinore trough, the southeastern end of the Santa Ana Mountains, and the Elsinore Mountains.
The oldest rocks consist of an assemblage of metamorphics of igneous effusive and sedimentary origin, probably, for the most part, of Triassic age. They are intruded by diorite and various hypabyssal rocks, then in turn by granitic rocks, which occupy over 40 percent of the area. Following this last igneous activity of probable Lower Cretaceous age, an extended period of sedimentation started with the deposition of the marine Upper Cretaceous Chico formation and continued during the Paloecene under alternating marine and continental conditions on the margins of the blocks. A marine regression towards the north, during the Neocene, accounts for the younger Tertiary strata in the region under consideration.
Outpouring of basalts to the southeast indicates that igneous activity was resumed toward the close of the Tertiary. The fault zone, which characterizes the Elsinor trough, marks one of the major tectonic lines of southem California. It separates the upthrown and tilted block of the Santa Ana Mountains to the south from the Perris Block to the north.
Most of the faults are normal in type and nearly parallel to the general trend of the trough, or intersect each other at an acute angle. Vertical displacements generally exceed the horizontal ones and several periods of activity are recognized.
Tilting of Tertiary and older Quaternary sediments in the trough have produced broad synclinal structures which have been modified by subsequent faulting.
Five old surfaces of erosion are exposed on the highlands.
The mineral resources of the region are mainly high-grade clay deposits and mineral waters.
| Item Type: | Thesis (Dissertation (Ph.D.)) | ||||||||||||||||||||||||
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| Subject Keywords: | geology ; mineral deposits ; Lake Elsinore Quadrangle, California | ||||||||||||||||||||||||
| Degree Grantor: | California Institute of Technology | ||||||||||||||||||||||||
| Division: | Geological and Planetary Sciences | ||||||||||||||||||||||||
| Major Option: | Geology | ||||||||||||||||||||||||
| Thesis Availability: | Public (worldwide access) | ||||||||||||||||||||||||
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| Defense Date: | 1933 | ||||||||||||||||||||||||
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| Additional Information: | <p>Cataloger’s note: Engel, Rene. I. Geology of the Southwest quarter of the Elsinore Quadrangle (1933). No copies [of this thesis] have ever been presented to C.I.T. The thesis has been published under the title: Geology of the Lake Elsinore Quadrangle, California (in Bulletin no. 146 of the California Division of Mines, entitled Geology and Mineral Deposits of the Lake Elsinore Quadrangle, California).</p> <p>Bulletin 146, a book containing two papers: Geology and Mineral Deposits of the Lake Elsinore Quadrangle, California, prepared by Rene Engel, and Mineral Deposits of Lake Elsinore Quadrangle, California by Rene Engel, Thomas E. Gay, Jr., and B. L. Rogers. The second paper, which is primarily concerned with the economic mineral deposits of the area, was compiled by two staff members of the Division of Mines, Messrs. Gay and Rogers, working under the supervision of Dr. Engel.</p> <p>7 plates included in the Bulletin have also been scanned and included as part of this record.</p> Supplemental Files Information: Geologic map of the Lake Elsinore Quadrangle: Supplement 1 from "I. Geology of the Southwest quarter of the Elsinore Quadrangle. II. Geochemical properties of the waters of the Elsinore Quadrangle [= Geology of the Lake Elsinore Quadrangle, California. Mineral deposits of Lake Elsinore Quadrangle, California]" (Thesis). Date(s) Collected: 1947. Geographic Location Bounding Box: -117.25 Degrees East; -117.5 Degrees West; 33.75 Degrees North; 33.5 Degrees South. Economic map of the Lake Elsinore Quadrangle: Supplement 2 from "I. Geology of the Southwest quarter of the Elsinore Quadrangle. II. Geochemical properties of the waters of the Elsinore Quadrangle [= Geology of the Lake Elsinore Quadrangle, California. Mineral deposits of Lake Elsinore Quadrangle, California]" (Thesis). Date(s) Collected: 1947. Geographic Location Bounding Box: -117.25 Degrees East; -117.5 Degrees West; 33.75 Degrees North; 33.5 Degrees South. Geologic sections, Lake Elsinore Quadrangle, California: Supplement 3 from "I. Geology of the Southwest quarter of the Elsinore Quadrangle. II. Geochemical properties of the waters of the Elsinore Quadrangle [= Geology of the Lake Elsinore Quadrangle, California. Mineral deposits of Lake Elsinore Quadrangle, California]" (Thesis). Good Hope Gold Mine, Riverside County, California: Supplement 4 from "I. Geology of the Southwest quarter of the Elsinore Quadrangle. II. Geochemical properties of the waters of the Elsinore Quadrangle [= Geology of the Lake Elsinore Quadrangle, California. Mineral deposits of Lake Elsinore Quadrangle, California]" (Thesis). Geologic map and sections of the southern Temescal Valley region: Supplement 5 from "I. Geology of the Southwest quarter of the Elsinore Quadrangle. II. Geochemical properties of the waters of the Elsinore Quadrangle [= Geology of the Lake Elsinore Quadrangle, California. Mineral deposits of Lake Elsinore Quadrangle, California]" (Thesis). Date(s) Collected: 1954/1955. Geographic Location Point: -117.5 Degrees Longitude; 33.75 Degrees Latitude. Geographic Location Point: -117.375 Degrees Longitude; 33.75 Degrees Latitude. Geologic map of Alberhill Coal and Clay Company clay deposits, Riverside County, California: Supplement 6 from "I. Geology of the Southwest quarter of the Elsinore Quadrangle. II. Geochemical properties of the waters of the Elsinore Quadrangle [= Geology of the Lake Elsinore Quadrangle, California. Mineral deposits of Lake Elsinore Quadrangle, California]" (Thesis). Geologic map and sections of Los Angeles Brick and Clay Products Company no.1 clay pit, Alberhill, Riverside Co., California: Supplement 7 from "I. Geology of the Southwest quarter of the Elsinore Quadrangle. II. Geochemical properties of the waters of the Elsinore Quadrangle [= Geology of the Lake Elsinore Quadrangle, California. Mineral deposits of Lake Elsinore Quadrangle, California]" (Thesis). Date(s) Collected: 1955-03-01. | ||||||||||||||||||||||||
| Record Number: | CaltechTHESIS:07012013-154748332 | ||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechTHESIS:07012013-154748332 | ||||||||||||||||||||||||
| DOI: | 10.7907/9QJ4-QD46 | ||||||||||||||||||||||||
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| Default Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||
| ID Code: | 7910 | ||||||||||||||||||||||||
| Collection: | CaltechTHESIS | ||||||||||||||||||||||||
| Deposited By: | Kathy Johnson | ||||||||||||||||||||||||
| Deposited On: | 01 Jul 2013 23:52 | ||||||||||||||||||||||||
| Last Modified: | 16 Aug 2023 23:06 |
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