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| Brassfield Limestone (1) |
| Cincinnati Arch (1) |
| Indiana (1) |
| Louisville Limestone (1) |
| Niagaran Series (1) |
| Salamonie Dolomite (1) |
| Salina Formation (1) |
| Silurian (1) |
| Stratigraphy (1) |
| Wabash Formation (1) |
Now showing items 1-10 of 1