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

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

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

References

  1. ↑ National Park Service: "The FISH CREEK CANYON ICHNOFAUNA: a PLIOCENE (BLANCAN) Vertebrate Footprint Assemblage from Anza-Borrego Desert State Park, California"; by Paul Remeika.
  2. ↑ San Diego State University.edu: "Environments of deposition, Pliocene Imperial Formation, Southeast Coyote Mountains, Imperial County, California"; Bell, Patricia J.; 1980.
  3. ↑ Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 8 July 2014.
  4. 1 2 "Lower Pliocene petrified wood from the Palm Spring Formation, Anza Borrego Desert State Park, California". Review of Palaeobotany and Palynology. 56: 183–198. doi:10.1016/0034-6667(88)90057-7.

Further reading

  • Weber, F. Harold (1963). Geology and mineral resources of San Diego County, California. California Division of Mines and Geology. p. 32.


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