[1] It is predominantly found in the Fort Tejon area of the San Emigdio Mountains and Tehachapi Mountains in Kern County, and around Martinez in Contra Costa County.
[1] Areas it surfaces, south to north, include:[1] It preserves prehistoric plant and fauna fossils dating back to the Paleogene period of the Cenozoic Era.
[2] Species (1897 taxa names) found only in the Tejon Formation include:[1]
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