Bedrock Geology (0)
| Tertiary undivided |
| Tertiary and Cretouceous undivided |
| Cretaceous undivided |
| Baylis Fm |
| Permian ultramafic intrusions |
| Mattoon Fm |
| Bond Fm |
| Shelburn-Patoka Fms |
| Carbondale Fm |
| Tradewater Fm |
| Caseyville Fm |
| Upper Pope Group |
| Lower Pope Group |
| Ste Genevieve Ls |
| St. Louis Ls |
| Warsaw Fm and Salem Ls |
| Ullin and Salem Ls |
| Bordon Siltstone |
| Meppen Ls, Fern Glen Fm, Burlington-Keokuk Ls |
| Ft. Payne Fm |
| Glen Park, Hannibal, Chouteau, McCraney, Prospect Hill, Starrs Cave |
| New Albany Shale |
| Muscatatuck Group |
| Tamms Group |
| Silurian undivided |
| Maquoketa Shale Group |
| Galena Group |
| Kimmswick Ls and Decorah Fm |
| Platteville Group |
| Ancell Group |
| Prairie du Chien Group |
| Cambrian undivided |
| Paleozoic undifferentiated |
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