Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Glenwood Shale  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Ordovician | |
| ....Middle Ordovician | |
| .....Glenwood Shale | |
| RT | Iowa |
| Illinois | |
| Ohio | |
| Wisconsin | |
| Minnesota | |
| Michigan | |
| Platteville Formation | |
| SN | In Platteville Formation. NE Iowa, W Illinois, Michigan, S Minnesota, Ohio and S Wisconsin. Added to Thesaurus in 1989. |