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| Hardinsburg Formation | |
|---|---|
| Stratigraphic range: Mississippian | |
| Type | Formation |
| Unit of | Stephensport Group |
| Underlies | Glen Dean Limestone |
| Overlies | Haney Limestone |
| Location | |
| Region | Illinois and Indiana |
| Country | United States |
The Hardinsburg Formation is a geologic formation in Illinois. It preserves fossils dating back to the Carboniferous period.