The Chatsworth Formation is a Cretaceous period sandstone geologic formation in the Simi Hills and western Santa Susana Mountains of southern California.[1] [2]
Chatsworth Formation | |
---|---|
Stratigraphic range: Campanian & Maestrichtian epochs of Cretaceous | |
![]() Chatsworth Formation at Stoney Point California | |
Typ | Formation |
Standort | |
Region | Los Angeles County and Ventura County, California |
Land | Vereinigte Staaten |
Extent | Simi Hills, Santa Susana Mountains |
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
editThe 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
editReferences
edit- ^ 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.