| Iola Formation | |
|---|---|
| Stratigraphic range: Carboniferous | |
 Fossiliferous limestone (Raytown Member, Iola Formation; Elk County, Kansas) | |
| Type | Formation |
| Unit of | Kansas City Group |
| Sub-units | Raytown Member |
| Location | |
| Region |  Illinois  Oklahoma  Kansas  Iowa |
| Country |  United States |
The Iola Formation is a geologic formation in Illinois, Iowa, Kansas and Oklahoma. It preserves fossils dating back to the Carboniferous period.
See also
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.
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