Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Clays Ferry Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Ordovician | |
| ....Clays Ferry Formation | |
| RT | Kentucky |
| Indiana | |
| Ohio | |
| SN | Middle and Upper Ordovician. Added to Thesaurus in 1989. |