Crowder Formation

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| name = Crowder Formation

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| type = Geologic formation

| age = Pliocene

| period = Pliocene

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| region = Mojave Desert,
in San Gabriel Mountains and San Bernardino Mountains,
Los Angeles County, San Bernardino County,
California

| country = United States

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| underlies =Harold Formation, Shoemaker Gravel

| overlies = Punchbowl Formation{{Cite Q| Q57842316|page=49}}

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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.[http://seismo.berkeley.edu/~rallen/teaching/S04_SanAndreas/Resources/PunchbowlFieldGuide.pdf Seismo.berkeley.edu: Field Guide to the Punchbowl Fault Zone, at Devil's Punchbowl Los Angeles County Park] {{Webarchive|url=https://web.archive.org/web/20160305005856/http://seismo.berkeley.edu/~rallen/teaching/S04_SanAndreas/Resources/PunchbowlFieldGuide.pdf |date=2016-03-05 }}; San Andreas Fault Resources; University of California, Berkeley; by Frederick M. Chester; January 1999.

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.[http://archives.datapages.com/data/pacific/data/067/067001/17_ps0670017.htm San Bernardino County Museum: "Miocene Faunas in the Lower Crowder Formation"], by R.E. Reynolds, 1984.[https://thesis.library.caltech.edu/282/ 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.