Dubuque Formation
The Dubuque Formation is a geologic formation in Illinois. It preserves fossils dating back to the Ordovician period.
| Dubuque Formation Stratigraphic range: Ordovician | |
|---|---|
| Type | Formation |
| Underlies | Maquoketa Formation |
| Overlies | Galena Group |
| Location | |
| Country | United States |
| Extent | Illinois and Minnesota |
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 22 June 2014.
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