Topanga Canyon Formation

Topanga Canyon Formation
Stratigraphic range: Neogene
TypeFormation
UnderliesModelo Formation
Location
RegionSanta Monica Mountains
Los Angeles County, California
CountryUnited States

The Topanga Canyon Formation (/təˈpæŋɡə/ ⓘ) is a Miocene epoch geologic formation in the Santa Monica Mountains, Simi Hills, Santa Ana Mountains and San Joaquin Hills, in Los Angeles County, Ventura County, and Orange County, southern California. It is primarily composed of hard sandstone with some inter-bedded siltstone.

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