Blue River Group
Appearance
Blue River Group | |
---|---|
Stratigraphic range: Carboniferous | |
Type | Group |
Sub-units |
|
Lithology | |
Primary | Limestone |
Other | Shale, Sandstone, Gypsum, Chert |
Location | |
Region | Illinois |
Country | United States |
Type section | |
Named for | The Blue River |
The Blue River Group is a geologic group in Illinois. It preserves fossils dating back to the Carboniferous period.
References
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