San Pablo Formation

The San Pablo Formation is a Late/Upper Miocene epoch geologic formation of the East Bay region in the San Francisco Bay Area, California.^[1]

San Pablo Formation
Stratigraphic range: Miocene
Type	Geologic formation
Sub-units	Briones Sandstone, Cierbo Sandstone, Neroly Sandstone
Underlies	Pinole Tuff Formation
Thickness	1,500 feet (460 m)
Location
Region	Contra Costa County, California
Country	United States

It is found on the south shore of San Pablo Bay, in western Contra Costa County.^[1]

Geology

It is series of marine sandstones with tuffs and ashes. Its subunits, listed alphabetically, are Briones Sandstone, Cierbo Sandstone, Neroly Sandstone,^[2] and underlies the Pinole Tuff Formation.^[1]

It preserves fossils dating back to the Neogene period.^[3]

See also

• California portal

• Miocene California geology
• List of fossiliferous stratigraphic units in California
• Paleontology in California