Mifflin Formation
Appearance
	
	
| Mifflin Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
Fossils from the Mifflin Formation (Lee County, Illinois)  | |
| Type | Formation | 
| Location | |
| Region | Illinois, Wisconsin, Iowa | 
| Country | United States | 
The Mifflin Formation is a fossil bearing geologic formation in Illinois dating to the Ordovician period.
See also
[edit]References
[edit]- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.