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Crowder Formation information


Crowder Formation
Stratigraphic range: Pliocene
TypeGeologic formation
UnderliesHarold Formation, Shoemaker Gravel
OverliesPunchbowl Formation[1]
Location
RegionMojave Desert,
in San Gabriel Mountains and San Bernardino Mountains,
Los Angeles County, San Bernardino County,
California
CountryUnited States

The Crowder Formation is a geologic formation in the Central and Western Mojave Desert, in northern Los Angeles County and eastern San Bernardino County, in Southern California.[2]

Areas where it is exposed include at the bases of the northern San Gabriel Mountains and northwestern San Bernardino Mountains, and in the Cajon Pass between them.[2][3][4]

  1. ^ Thomas W. Dibblee (1967). "Areal geology of the western Mojave Desert, California" (PDF). Geological Survey Professional Paper. 522: 49. doi:10.3133/PP522. ISSN 0096-0446. Wikidata Q57842316.
  2. ^ a b Seismo.berkeley.edu: Field Guide to the Punchbowl Fault Zone, at Devil's Punchbowl Los Angeles County Park Archived 2016-03-05 at the Wayback Machine; San Andreas Fault Resources; University of California, Berkeley; by Frederick M. Chester; January 1999.
  3. ^ San Bernardino County Museum: "Miocene Faunas in the Lower Crowder Formation", by R.E. Reynolds, 1984.
  4. ^ Caltech Thesis: "Neotectonics of the north frontal fault system of the San Bernardino Mountains, southern California : Cajon Pass to Lucerne Valley", Meisling, Kristian Erik (1984), Dissertation (Ph.D.), California Institute of Technology.

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