| Coso Formation | |
|---|---|
| Stratigraphic range: Neogene | |
| Type | Formation |
| Location | |
| Region | Inyo County, California |
| Country | United States |
The Coso Formation is a geologic formation in the Coso Range of the Mojave Desert, in Inyo County, California.
It preserves fossils dating back to the Neogene period. It yields fossil remains of many species of mammals, including of Equus simplicidens, the Hagerman Horse.
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