Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Sylvania Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Devonian | |
| ....Middle Devonian | |
| .....Sylvania Formation | |
| RT | Ontario |
| Ohio | |
| Michigan | |
| Detroit River Group | |
| SN | SE Michigan, NW Ohio, and Ontario. |