Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Crab Orchard Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Silurian | |
| ....Crab Orchard Formation | |
| RT | Kentucky |
| Ohio | |
| SN | Lower and Middle Silurian. Kentucky and SW Ohio. Added to Thesaurus in 1989. |