Type Geologic formation | Thickness 1,500 feet (460 m) Overlies Briones Formation | |
Region | ||
The San Pablo Formation is an Late/Upper Miocene epoch geologic formation of the East Bay region in the San Francisco Bay Area, California.
It is found on the south shore of San Pablo Bay, in western Contra Costa County.
Geology
It is series of marine sandstones with tuffs and ashes. It overlies the Briones Formation, and underlies the Pinole Tuff Formation.
It preserves fossils dating back to the Neogene period.
References
San Pablo Formation Wikipedia(Text) CC BY-SA