Llajas Formation

The Llajas Formation is a non-marine to marine conglomerate geologic formation in Southern California.
It is found in the Transverse Ranges geologic province, within Los Angeles County and Ventura County. Locations include the Simi Hills, Simi Valley, and Santa Susana Mountains.
It preserves fossils dating back to the early and middle Eocene epoch of the Paleogene period.