| Tejon Formation | |
|---|---|
| Stratigraphic range: Paleogene | |
| Type | Formation |
| Underlies | Ione Formation (regionally) |
| Overlies | Martinez Formation (regionally), Chico Formation (regionally) |
| Thickness | 2,100–2,300 feet (640–700 m) |
| Lithology | |
| Primary | conglomerate, shale |
| Location | |
| Region | California |
| Country | United States |
| Type section | |
| Named for | Fort Tejon |
The Tejon Formation is a Paleogene period geologic formation in California.
Geology
The formation regionally overlies the Martinez Formation or the Chico Formation. 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.
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.
Areas it surfaces, south to north, include:
- 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
Fossils
It preserves prehistoric plant and fauna fossils dating back to the Paleogene period of the Cenozoic Era.
Species
Species (1897 taxa names) found only in the Tejon Formation include:
- Cardita horni
- Fusus sequileteralis
- Megistostigma striata
- Modiola ornata
- Morio tuberculatus
- Telina martinezensis
- Telina horni
- Thracia karquinezensis
- Turritella conica
- Turritella infragranulata
- Tritonium eocenicum
See also
- List of fossiliferous stratigraphic units in California
- Paleogene California
- Paleontology in California
References
- ^ Google Books: "The stratigraphic and faunal relations of the Martinez formation to the Chico and Tejon of Southern California", Clarence A. Waring; Stanford University Dept. of Geology; Jun 4, 2011 . accessed 1.16.2016.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
 | This article about a specific stratigraphic formation in California is a stub. You can help Misplaced Pages by expanding it. |
This article related to the Paleogene period is a stub. You can help Misplaced Pages by expanding it. |
- Paleogene California
- Geology of Kern County, California
- Geology of Los Angeles County, California
- Geology of Orange County, California
- Geology of San Benito County, California
- Geology of Ventura County, California
- Geography of the San Joaquin Valley
- Natural history of the Santa Monica Mountains
- San Emigdio Mountains
- Simi Hills
- Tehachapi Mountains
- Geologic formations of California
- California geologic formation stubs
- Paleogene stubs