| <Null> |
| Borden shales and siltstones |
| Devonian undifferentiated |
| Liston Creek Formation |
| Mississippian undifferentiated |
| New Albany, Antrim, Elsworth, or Sunbury shales |
| Ordovician limestone interbedded with shale |
| Ordovician undifferentiated |
| Pennsylvanian sandstone |
| Pennsylvanian undifferentiated |
| Rockford Limestone |
| Silurian undifferentiated |