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| Edwardsville Formation | |
|---|---|
| Stratigraphic range: Mississippian | |
| Type | Formation |
| Unit of | Borden Group |
| Underlies | Muldraugh Formation and Ramp Creek Formation |
| Overlies | Spickert Knob Formation |
| Location | |
| Region | Indiana |
| Country | United States |
The Edwardsville Formation is a geological structure in the Borden Group, of the Lower Mississippian sub system, (Osagean, late Tournaisian). Crinoids fossils can be found in the formation.
References
- Edwardsville Formation at the Indiana Geological Survey
- Crinoids from the Edwardsville Formation (Lower Mississippian) of Southern Indiana. William I. Ausich and N. Gary Lane, Journal of Paleontology, November 1982, Volume 56, Number 6, pages 1343-1361 (abstract)