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| Elwren Formation | |
|---|---|
| Stratigraphic range: Mississippian | |
| Type | Formation |
| Unit of | West Baden Group |
| Underlies | Beech Creek Limestone |
| Overlies | Reelsville Limestone |
| Location | |
| Region | Indiana and Kentucky |
| Country | United States |
The Elwren Formation is a geologic formation in Kentucky. It preserves fossils dating back to the Carboniferous period.