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Type of Document	Dissertation
Author	Moore, Bernard N.
URN	etd-02122007-142830
Persistent URL	http://resolver.caltech.edu/CaltechETD:etd-02122007-142830
Title	Geology of the southern Santa Ana Mountains, Orange County, California
Degree	PhD
Option	Geological and Planetary Sciences
Advisory Committee	Advisor Name Title unknown Committee Member
Keywords	none
Date of Defense	1930-01-01
Availability	unrestricted
Abstract The area studied lies on the southwestern slope of the Santa Ana Mountains in the southeastern quarter of the Corona Quadrangle. The oldest rocks are a series of slates and sandstones with some lenses of limestone and intruded by andesite porphyry dikes. Unconformably overlying the slates is a coarse conglomerate and in part of the area a series of basic lavas and tuffs. All these rocks have been metamorphosed by andesite granodiorite and diabase intrusions. Triassic fossils have been reported from the slates. The rocks overlying the "basement complex" constitute a westward dipping homocline, including upper Cretaceous. Paleocene, and middle Eocene formations, the Vaqueros and Topanga formations, the Puente shales, and the Capistrano formation, each of which is bounded by an unconformity or disconformity. The structure is unusual in that, while the sediments are those typical of the Coast Ranges, the mountains are a tilted fault block, uplift taking place along the Elsinore fault system. The detailed structure consists of a few folds and faults not aligned with the Elsinore system. The physiographic history shows a long seres of repeated uplifts. Some of the lower terraces are marine. In the evolution of the present topography the resistance of the rocks has played a large part.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access    Moore_bn_1930.pdf 44.82 Mb 03:27:28 01:46:42 01:33:22 00:46:41 00:03:59   Moore_bn_1930_plate_1.pdf 19.73 Mb 01:31:20 00:46:58 00:41:06 00:20:33 00:01:45   Moore_bn_1930_plate_2.pdf 30.31 Mb 02:20:18 01:12:09 01:03:08 00:31:34 00:02:41