Black River Group

The Black River Group is a geologic group in Illinois and West Virginia. It preserves fossils dating back to the Ordovician period.

Black River Group
Stratigraphic range: Late Ordovician
TypeGroup
UnderliesLexington Limestone and Trenton Group
OverliesSt. Paul Group and Wells Creek Formation
Location
RegionIllinois, Ohio, and West Virginia
CountryUnited States

See also

References

  • Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 22 June 2014.


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