San Francisquito Formation
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UnderliesCastaic & Punchbowl Formations
OverliesSan Gabriel Basement Complex
Thickness4 km (13,000 ft)
| San Francisquito Formation | |
|---|---|
| Stratigraphic range: Maastrichtian-Danian ~ | |
| Type | Geologic formation |
| Underlies | Castaic & Punchbowl Formations |
| Overlies | San Gabriel Basement Complex |
| Thickness | 4 km (13,000 ft) |
| Lithology | |
| Primary | Sandy shale |
| Location | |
| Coordinates | 34°36′N 118°36′W / 34.6°N 118.6°W |
| Approximate paleocoordinates | 39°30′N 96°30′W / 39.5°N 96.5°W |
| Region | Los Angeles County, California |
| Country | United States |
| Extent | San Gabriel Mountains & Sierra Pelona Mountains |
  San Francisquito Formation (the United States)  San Francisquito Formation (California) | |
The San Francisquito Formation is a geologic formation located in northern Los Angeles County, California.[1][2]
Areas where it is exposed include: San Francisquito Canyon of the Sierra Pelona Mountains, as well as on the northwestern side of the Devil's Punchbowl gorge in the San Gabriel Mountains.[1][2]
