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Tejon Formation
Geologic formation in California, United States From Wikipedia, the free encyclopedia
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The Tejon Formation is a Paleogene period geologic formation in California.
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Geology
The formation regionally overlies the Martinez Formation or the Chico Formation.[1] Paleontology in the Tejon Formation indicates a more tropical climate than during the Martinez Formation's period, with fauna that flourished in its littoral conditions.[1]
Occurrences
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]
- Santa Ana Mountains
- Santa Monica Mountains — near Calabasas.
- Simi Hills — eastern section
- Santa Susana Mountains — section in northwestern Simi Valley
- Santa Clara River Valley — Rancho Camulos area
- Topatopa Mountains — Sespe gorge area
- Fort Tejon area of the San Emigdio Mountains and Tehachapi Mountains
- San Joaquin Valley−Diablo Range — New Idria Mercury Mine area
- Mount Diablo — northern area
- Martinez area on the Sacramento Delta
- Clear Lake — Lower Lake area
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Fossils
It preserves prehistoric plant and fauna fossils dating back to the Paleogene period of the Cenozoic Era.[2]
Species
Species (1897 taxa names) found only in the Tejon Formation include:[1]
- Cardita horni
- Fusus sequileteralis
- Megistostigma striata
- Modiola ornata
- Morio tuberculatus
- Telina martinezensis
- Telina horni
- Thracia karquinezensis
- Turritella conica
- Turritella infragranulata
- Tritonium eocenicum
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See also
References
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