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| Dillsboro Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Formation |
| Unit of | Maquoketa Group |
| Underlies | Fort Atkinson Limestone and Whitewater Formation |
| Overlies | Kope Formation |
| Location | |
| Region | Indiana, Ohio |
| Country | United States |
The Dillsboro Formation is a geologic formation in Ohio. It preserves fossils dating back to the Ordovician period.