Regional Bedrock Geology (1:250,000) (3)
| P5 - McLeansboro Group (upper) |
| P4 - McLeansboro Group (middle) |
| P3,PWF - McLeansboro Group (lower, w/ top West Franlin Limestone Mbr) |
| P2,PS - Carbondale Group (w/ top Springfield Coal Mbr) |
| P1,PB,PLB - Raccoon Creek Group (w/ top Buffaloville Coal Mbr, base Lower Block Coal Mbr) |
| M6,MM - Rocks of late Chester Age (w/ top Menard Frm) |
| M5 - Stephensport Group |
| M4 - West Baden Group |
| M3 - Blue River Group |
| M2 - Sanders Group |
| M1 - Borden Group |
| DM - New Albany Formation |
| D2 - Antrim Formation |
| D - Muscatatuck Group |
| S2 - Salina Formation |
| S1,SLC,SM,SW - Niagaran Series (w/ base Liston Creek Mbr, base Mississinewa Mbr, base Waldron Frm) |
| O2,OD,OK - Maquoketa Group (w/ top Dillsboro Frm, top Kope Frm) |
| O1 - Lexington Formation |
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