Blue River Group

Blue River Group
Stratigraphic range: Carboniferous
TypeGroup
Sub-units
Lithology
PrimaryLimestone
OtherShale, Sandstone, Gypsum, Chert
Location
RegionIllinois
CountryUnited States
Type section
Named forThe Blue River

The Blue River Group is a geologic group in Illinois. It preserves fossils dating back to the Carboniferous period.

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