Palm Spring Formation
| Palm Spring Formation | |
|---|---|
| Stratigraphic range: Lower Pleistocene | |
| Type | Geologic formation |
| Underlies | Vallecito Badlands |
| Overlies | Imperial Formation, Ocotillo Formation |
| Location | |
| Region | Colorado Desert, California |
| Country | United States |
The Palm Spring Formation is a Pleistocene Epoch geologic formation in the eastern Colorado Desert of Imperial County and San Diego County County, Southern California.
Geology
[edit | edit source]The Palm Spring Formation is an extensively-exposed delta-plain deposit debouched by the ancestral Colorado River across the subsiding Salton Trough.[1] It records the development of the prehistoric Colorado River delta cone into a barrier excluding marine waters from the Salton Trough.[2]
Fossils
[edit | edit source]It preserves fossils from the Pleistocene Epoch, during the Quaternary Period of the Cenozoic Era.[3]
Lower Pliocene sub−period petrified wood is found in Anza-Borrego Desert State Park.[4] The Lauraceae is represented by petrified Umbellularia, the Salicaceae with petrified Populus and Salix, and the Juglandaceae with petrified Juglans.[4]
See also
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- Ocotillo Formation — fluvial-alluvial fan Pliocene formation
- Quaternary California
- List of fossiliferous stratigraphic units in California
- Paleontology in California
References
[edit | edit source]- ^ National Park Service: "The FISH CREEK CANYON ICHNOFAUNA: a PLIOCENE (BLANCAN) Vertebrate Footprint Assemblage from Anza-Borrego Desert State Park, California"; by Paul Remeika.
- ^ San Diego State University.edu: "Environments of deposition, Pliocene Imperial Formation, Southeast Coyote Mountains, Imperial County, California" Archived 2015-10-04 at the Wayback Machine; Bell, Patricia J.; 1980.
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Further reading
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