Au Train Formation
The Au Train Formation is a geologic formation in Michigan. It preserves fossils dating back to the Ordovician period.
| Au Train Formation | |
|---|---|
| Stratigraphic range: Early Ordovician | |
Au Train Formation at Munising Falls (Pictured Rocks National Lakeshore) | |
| Type | Formation |
| Underlies | Black River Formation |
| Overlies | Munising Formation |
| Location | |
| Region | Michigan |
| Country | United States |
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