Chatsworth Formation
| Chatsworth Formation | |
|---|---|
| Stratigraphic range: Campanian & Maestrichtian epochs of Cretaceous | |
 Chatsworth Formation at Stoney Point California | |
| Type | Formation |
| Location | |
| Region | Los Angeles County and Ventura County, California |
| Country | United States |
| Extent | Simi Hills, Santa Susana Mountains |
The Chatsworth Formation is a Cretaceous period sandstone geologic formation in the Simi Hills and western Santa Susana Mountains of southern California.[1] [2]
It is found in western Los Angeles County and eastern Ventura County. The formation's thickness can be more than 610 metres (2,000 ft).[3]
Fossils
The sedimentary marine formation preserves fossils dating from the Middle Campanian to Early Maestrichtian epochs of the Cretaceous period.[1][4] It has diverse molluscan faunas.[3]
The most common taxa are:[5]
- ringiculid Biplica
- naticids Gyrodes and Euspira
- trochid Atira
- aporrhaids Anchuras and Lispodesthes
- turritellid Turritella
- perissityid Perissitys
See also
- Stoney Point (California) — Chatsworth Formation landmark.
- Cretaceous California
- Geology of Los Angeles County, California
- List of fossiliferous stratigraphic units in California
- Paleontology in California
References
- ^ a b AAPG Archives: Paleographic Interpretation of the Chatsworth Formation
- ^ Cleanuprocketdyne.org: Santa Susana Field Lab links to Chatsworth Formation groundwater contamination
- ^ a b USGS.gov: "Preliminary geologic map of the Santa Susana quadrangle, Southern California"
- ^ Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
- ^ Overview of late cretaceous marine gastropods from the Simi Hills, by Mary Stecheson, Department of Geological Sciences, California State Univ, Northridge.