Groos Quarry Formation
| Groos Quarry Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Formation | 
| Unit of | Trenton Group | 
| Location | |
| Region | Michigan | 
| Country | United States | 
The Groos Quarry Formation is a geologic formation in Michigan. It preserves fossils dating back to the Ordovician period.
See also
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.