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An invertebrate fauna from the "Modelo" of Dry Canyon, Los Angeles County, California


Buffington, Edwin Conger (1947) An invertebrate fauna from the "Modelo" of Dry Canyon, Los Angeles County, California. Master's thesis, California Institute of Technology.


The age of the Mint Canyon formation and it's stratigraphic relationships with the marine "Modelo" formation immediately overlying it have caused much discussion in recent years. Age determinations resulting from studies of vertebrate faunas collected from the Mint Canyon and invertebrate faunas collected from the "Modelo" differ considerably. The value of the equid genus Hipparion, as an index to the lower Pliocene, has been questioned. An investigation, the results of which are embodied in this paper, included the collection of an invertebrate fauna from the "Modelo", the measurement of a detailed columnar section, and a comparison and evaluation of the fossils found. Three new species are described and 26 others are recorded. A lower Neroly age (uppermost Miocene) is assigned to the "Modelo."

Item Type:Thesis (Master's thesis)
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):
  • Durham, J. Wyatt
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 June 1947
Record Number:CaltechTHESIS:03312010-112652744
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5661
Deposited By: Tony Diaz
Deposited On:16 Apr 2010 17:21
Last Modified:26 Dec 2012 03:23

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