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Geophysical investigations in the Colorado delta region


Kovach, Robert Louis (1962) Geophysical investigations in the Colorado delta region. Dissertation (Ph.D.), California Institute of Technology.


The combined approach of gravity and seismic re-fraction exploration was used to determine depths of the Cenozoic section and to study the fault pattern in the Colorado Delta region. Basement depths measured varied from about 2200 feet to a minimum depth of 15,400 feet along the international border, east of Calexico. A study of the seismicity of the region shows that the greatest seismic activity over the past 60 years has been along the San Jacinto fault system. Continuity of specific major faults is difficult to establish using gravity methods alone because of the lack of indicated vertical throw on the faults. No conclusive evidence is presented for establishing the continuity of the Mission Creek-Banning fault southward into the present area of investigation, although geophysical evidence is presented for a fault present beneath the Sand hills (Algodones Dunes).

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Geology
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):
  • Press, Frank
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1962
Record Number:CaltechTHESIS:12072009-142350784
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5426
Deposited By: Tony Diaz
Deposited On:07 Dec 2009 22:57
Last Modified:26 Dec 2012 03:19

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