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Areal geology and contact relations of the basement complex and later sediments, west end of the San Gabriel Mountains, California

Citation

Holloway, J. M. (1940) Areal geology and contact relations of the basement complex and later sediments, west end of the San Gabriel Mountains, California. Master's thesis, California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-10102006-142925

Abstract

The west end of the San Gabriel Mountains is a relatively small block of pre-Cretaceous metamorphic complex faulted from the main mass of the San Gabriel Mountains by the San Gabriel fault. Their core of metamorphic rocks is flanked on three sides by Tertiary sediments represented by Eocene, Pliocene, and Pleistocene formations. The Eocene and Pliocene are characteristic off-shore and littoral marine deposits. The Pleistocene is principally of terrestrial origin.

The area is one of structural complexity. This can be accounted for, in part, by assuming that this end of the mountain block acted as a centre of rotation for north-south compressional forces that were active to the west.

The San Gabriel Range is believed to be a fault block, raised to its present elevation principally by movements along faults which parallel the north and south margins. The faulting is not restricted to the extreme margins, but often is located within the range itself.

The west slope of the range is characterized by depositional relations between the sediments and the underlying mountain mass. If any faulting has occurred, it is thought to be farther west than the contact between the sediments and the basement complex and to be concealed beneath the younger sediments.

Item Type:Thesis (Master's thesis)
Degree Grantor:California Institute of Technology
Division:Geological and Planetary Sciences
Major Option:Geological and Planetary Sciences
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Bode, Francis D. (advisor)
  • Maxson, John H. (advisor)
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1940
Record Number:CaltechETD:etd-10102006-142925
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-10102006-142925
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4021
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:27 Oct 2006
Last Modified:26 Dec 2012 03:04

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