Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Prairie du Chien Group  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Ordovician | |
| ....Lower Ordovician | |
| .....Prairie du Chien Group | |
| RT | Iowa |
| Illinois | |
| Wisconsin | |
| Minnesota | |
| Oneota Dolomite | |
| Shakopee Formation | |
| SN | SW Wisconsin, Illinois, Iowa and S Minnesota. Added to Thesaurus in 1985. |