From HandWiki - Reading time: 1 min
| Topanga Canyon Formation Stratigraphic range: Neogene | |
|---|---|
| Type | Formation |
| Underlies | Modelo Formation |
| Location | |
| Region | Santa Monica Mountains Los Angeles County, California |
| Country | United States |
The Topanga Canyon Formation (/təˈpæŋɡə/ (
listen)) 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 .[1] It is primarily composed of hard sandstone with some inter-bedded siltstone.
It preserves fossils dating back to the Miocene epoch of the Neogene period, during the Cenozoic Era.[2][3]