Pinole Tuff Formation

Pinole Tuff Formation
Stratigraphic range: Neogene
TypeGeologic formation
UnderliesOrinda Formation,
Monterey Formation Group units
OverliesNeroly Formation
San Pablo Formation
Thickness270 metres (890 ft)
Lithology
PrimaryTuff, breccia
Location
RegionContra Costa County
California
CountryUnited States
Type section
Named forPinole, California

The Pinole Tuff Formation is a geologic formation of the East Bay region of the San Francisco Bay Area in California.

It is found near Pinole and Rodeo area at San Pablo Bay and the Briones Hills of western Contra Costa County.

Fossils

It preserves fossils, including Oncorhynchus rastrosus[1] and fragments of a proto-hipparion prehistoric horse, dating back to the Neogene period.

See also

References

  1. ^ Cavender, Ted M.; Miller, Robert Rush (1972). "Smilodonichthys Rastrosus: A New Pliocene Salmonid Fish from Western United States". Bulletin of the Museum of Natural History. 18. University of Oregon.


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