Stratigraphic range: Pliocene epoch of Neogene Period
|Underlies||Harold Formation, Shoemaker Gravel|
|Overlies||San Francisquito Formation (western area), San Gabriel Basement Complex|
in San Gabriel Mountains and San Bernardino Mountains,
Los Angeles County, San Bernardino County,
The Crowder Formation was formed during the Pliocene epoch of the Neogene period. The formation was deposited by drainages carrying distinctive volcanic and metamorphic clasts from the Victorville area southward.
The formation preserves fossils of prehistoric insects, reptiles, rodents, birds, and larger mammals. The species date back to the Miocene and Pliocene epochs of the Neogene period. 29 taxa were collected by the San Bernardino County Museum from the Cajon Pass area of the Crowder Formation.
- Neogene geologic formations in California
- List of fossiliferous stratigraphic units in California
- Paleontology in California
- Seismo.berkeley.edu: Field Guide to the Punchbowl Fault Zone, at Devil's Punchbowl Los Angeles County Park; San Andreas Fault Resources; University of California, Berkeley; by Frederick M. Chester; January 1999.
- San Bernardino County Museum: "Miocene Faunas in the Lower Crowder Formation", by R.E. Reynolds, 1984.
- 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.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 8 July 2014.
- "The Physical and Magnetic Stratigraphy of the Miocene Crowder Formation, Cajon Pass, Southern California"; by Douglas Scott Winston, University of Southern California; Los Angeles, 1985.
|Aquitanian | Burdigalian
Langhian | Serravallian
Tortonian | Messinian
|Zanclean | Piacenzian|
|This article about a specific stratigraphic formation in California is a stub. You can help Wikipedia by expanding it.|
|This article related to the Neogene period is a stub. You can help Wikipedia by expanding it.|