# Chanac Formation

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The **Chanac Formation** is a [Cenozoic Era](/source/Cenozoic) [sandstone](/source/Sandstone) [geologic formation](/source/Formation_(geology)) in the southeastern [San Joaquin Valley](/source/San_Joaquin_Valley), within [Kern County, California](/source/Kern_County,_California).[1]

## Geology

The Kern River Series is divided into the lower Chanac Formation unit, and the upper [Kern River Beds Formation](/source/Kern_River_Beds) unit, with the wedge of the [Etchegoin Formation](/source/Etchegoin_Formation) in the middle in the western section.[1] It is composed of [sandstone](/source/Sandstone) and cobble [conglomerate](/source/Conglomerate_(geology)).[1] It overlies the [Miocene](/source/Miocene) period [Santa Margarita Formation](/source/Santa_Margarita_Formation).

It preserves [fossils](/source/Fossils) dating back to the [Neogene](/source/Neogene) [period](/source/Period_(geology)).[2]

## Fossil content

### Mammals

#### Carnivorans

Carnivorans reported from the Chanac Formation Genus Species Presence Material Notes Images Borophagus B. littoralis North Tejon Hills, Kern County, California.[3] Left molar (LACM 16585).[3] A borophagine dog also found in the Green Valley, Santa Margarita and Dove Spring formations. Epicyon E. haydeni North Tejon Hills, Kern County, California.[3] Nuchal fragment of skull (LACM 16581).[3] A borophagine dog.

## See also

- c. Geology of Kern County, California
- c. Neogene California
- [List of fossiliferous stratigraphic units in California](/source/List_of_fossiliferous_stratigraphic_units_in_California)
- [Paleontology in California](/source/Paleontology_in_California)

## References

1. [USGS.gov: "The Kern River Formation, Southeastern San Joaquin Valley, California"](https://pubs.usgs.gov/bul/1529d/report.pdf); Geological Survey Bulletin 1529-D; By J. Alan Bartow and Gardner M. Pittman; United States Government Printing Office, Washington, D.C.; 1983 (with map on pg. D4).

1. ((Various Contributors to the Paleobiology Database)). ["Fossilworks: Gateway to the Paleobiology Database"](https://www.fossilworks.org). Retrieved 17 December 2021.

1. Wang, Xiaoming; Tedford, Richard H.; Taylor, Beryl E. (1999). ["Phylogenetic systematics of the Borophaginae (Carnivora, Canidae)."](https://digitallibrary.amnh.org/handle/2246/1588). *Bulletin of the AMNH*. '***(243): 9–391. [hdl:2246/1588](https://hdl.handle.net/2246/1588)***

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