| Fort Atkinson Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
| Rock sample from the Fort Atkinson Formation | |
| Type | Formation |
| Unit of | Maquoketa Group |
| Location | |
| Region | Wisconsin |
| Country | United States |
The Fort Atkinson Formation is a geologic formation in Wisconsin. It preserves fossils dating back to the Ordovician period.