| Chatsworth Formation | |
| Type: | Formation |
| Age: | Campanian & Maestrichtian epochs of Cretaceous |
| Period: | Late Cretaceous |
| 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 610m (2,000feet).[3]
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]