| Minnelusa Formation | |
|---|---|
| Stratigraphic range: Carboniferous | |
_13_(32745751066).jpg) Fairburn Agate (ultimately derived from the Minnelusa Formation; South Dakota) | |
| Type | Formation |
| Location | |
| Region | South Dakota, Nebraska |
| Country | United States |
The Minnelusa Formation is a geologic formation in South Dakota. It preserves fossils dating back to the Carboniferous period.
