| State | Iowa |
|---|---|
| Name | Shawnee Group |
| Geologic age | Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Late [Virgil] |
| Comments | Approx thickness 220 ft. |
| Primary rock type | limestone |
| Secondary rock type | shale |
| Other rock types | |
| Lithologic constituents | Major
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
|
| Map references | Hershey H. G. 1969, Geologic Map of Iowa: Iowa Geological Survey, scale 1:500K |
| Unit references | Hershey H. G. 1969, Geologic Map of Iowa: Iowa Geological Survey, scale 1:500K |
| Counties | Adair - Adams - Cass - Fremont - Madison - Montgomery - Page - Pottawattamie - Taylor - Union |