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Sources of Miocene sediments in southwestern San Joaquin Valley


Findlay, Willard Alexander (1940) Sources of Miocene sediments in southwestern San Joaquin Valley. Dissertation (Ph.D.), California Institute of Technology.


This investigation constitutes an attempt to determine by studies of heavy minerals, using a statistical approach, the sources of Miocene sands occurring along the southwestern border of San Joaquin Valley, and from a knowledge of these sources to deduce inferences regarding distribution of the sands and Miocene paleogeographic conditions. The method of attack chosen was to compare heavy mineral assemblages of the Miocene sands in question with those (1) of extant possible source areas and (2) of other post-Franciscan sediments the sources of which can be more readily inferred. The method used for sampling possible source areas was to sample fresh recent sands from streams draining these areas. Miocene samples were discreet "spot" samples. Considerable attention was given to development of laboratory and microscopic technique. The two items in this regard which are considered to represent most progress in technique are (1) use of ruled slides for grain counts, and (2) a method for use in centrifuge separations of heavy minerals. Effective methods of assembling and representing mineralogical results were devised.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Geology
Degree Grantor:California Institute of Technology
Division:Geological and Planetary Sciences
Major Option:Geology
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Campbell, Ian (advisor)
  • Buwalda, John P. (co-advisor)
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1940
Record Number:CaltechETD:etd-02212006-091933
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:692
Deposited By: Imported from ETD-db
Deposited On:21 Feb 2006
Last Modified:12 Nov 2016 00:30

Thesis Files

PDF (Findlay_wa_1940.pdf) - Final Version
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PDF (Findlay_wa_1940_plate_II.pdf) - Final Version
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PDF (Findlay_wa_1940_plate_III.pdf) - Final Version
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