Detroit River Group
| Detroit River Group | |
|---|---|
| Stratigraphic range: Devonian | |
| Type | Group | 
| Sub-units | Lucas Dolomite, Formosa Reef Limestone | 
| Underlies | Dundee Limestone and Traverse Formation | 
| Overlies | Holland Quarry Shale and Wabash Formation | 
| Location | |
| Region | Indiana, Michigan and Ohio | 
| Country | United States | 
The Detroit River Group is a geologic group in Michigan and Ohio. It preserves fossils dating back to the Devonian period.