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Forbes Shale

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Geologic formation in the Sacramento Valley, California, USA
Forbes Shale
Stratigraphic range: Coniacian
~89.8–86.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
TypeFormation
Unit ofAsuncion Group
UnderliesKione Sands
OverliesFunks Shale
Thickness1,300 ft (400 m)
Lithology
PrimaryShale
Location
Coordinates38°36′N 122°00′W / 38.6°N 122.0°W / 38.6; -122.0
Approximate paleocoordinates42°48′N 86°30′W / 42.8°N 86.5°W / 42.8; -86.5
RegionCalifornia
Country United States
ExtentSacramento Valley
Forbes Shale is located in the United StatesForbes ShaleForbes Shale (the United States)Show map of the United StatesForbes Shale is located in CaliforniaForbes ShaleForbes Shale (California)Show map of California

The Forbes Shale is a geologic formation in the Sacramento Valley of northern California, United States. It is found in the Sutter Buttes area of Sutter County, California. It preserves fossils dating back to the Coniacian stage of the Late Cretaceous period.

Fossil content

The following fossils were reported from the formation:

Bivalves
Gastropods
Ammonites

See also

References

  1. ^ Forbes Shale at Fossilworks.org
  2. Anderson, 1958

Bibliography

  • Anderson, F. M (1958), "Upper Cretaceous of the Pacific Coast", Geological Society of America Memoir, Geological Society of America Memoirs, 71: 1–378, doi:10.1130/MEM71-p1

Further reading

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