Dubuque Formation
Dubuque Formation Stratigraphic range: Ordovician | |
---|---|
Type | Formation |
Underlies | Maquoketa Formation |
Overlies | Galena Group |
Location | |
Region | Illinois, Minnesota |
Country | United States |
The Dubuque Formation is a geologic formation in Illinois, Iowa, Wisconsin and Minnesota. It preserves fossils dating back to the Ordovician period.
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References[]
Categories:
- Ordovician Minnesota
- Ordovician Iowa
- Ordovician Illinois
- Ordovician geology of Wisconsin
- Ordovician southern paleotropical deposits
- Illinois geologic formation stubs