Amherstburg Formation
| Amherstburg Formation | |
|---|---|
| Stratigraphic range: Middle Devonian | |
| Type | Formation | 
| Unit of | Detroit River Group | 
| Underlies | Lucas Formation | 
| Overlies | Sylvania Sandstone | 
| Location | |
| Region | Michigan, Ohio, and Ontario | 
| Country | Canada and United States | 
The Amherstburg Formation is a geologic formation in Ontario, Canada and Michigan, United States. It preserves fossils dating back to the Devonian period.