| Nachusa Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Formation |
| Location | |
| Region |  Illinois |
| Country |  United States |
The Nachusa Formation is a geologic formation in Illinois. It preserves fossils dating back to the Ordovician period.
See also
[edit]
References
[edit]- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.