Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Douglas Group  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Carboniferous | |
| ....Pennsylvanian | |
| .....Upper Pennsylvanian | |
| ......Virgilian | |
| .......Douglas Group | |
| RT | Iowa |
| Missouri | |
| Nebraska | |
| Kansas | |
| Lawrence Formation | |
| SN | Includes Stranger Formation, and Lawrence Formation. SW Iowa, E Kansas, NW Missouri, and SE Nebraska. |