. "The Chatsworth Formation is a Cretaceous period sandstone geologic formation in the Simi Hills and western Santa Susana Mountains of southern California. 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)."@en . . . . . "3908"^^ . . . . . "1107589326"^^ . . . . "Chatsworth Formation"@en . . "The Chatsworth Formation is a Cretaceous period sandstone geologic formation in the Simi Hills and western Santa Susana Mountains of southern California. 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)."@en . . . . . "Late Cretaceous"@en . . . . . . . . . . . . . . . . . "Los Angeles County and Ventura County, California"@en . . . . . . . . "Campanian & Maestrichtian epochs of Cretaceous"@en . . . . . . . "Chatsworth Formation at Stoney Point California"@en . . . . . . . . . . . . . "43267207"^^ . . . . . . . . "Chatsworth Formation"@en . . . . . . . . . . . . .