Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Tongue River Member  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Paleogene | |
| ....Paleocene | |
| .....Tongue River Member | |
| RT | Wyoming |
| Montana | |
| North Dakota | |
| South Dakota | |
| Fort Union Formation | |
| SN | In Fort Union Formation. In Montana and North Dakota, composed of light-yellow, tan, and gray sandstones and shales; thin lenses of limestone; and numerous beds of lignite. Found in E Montana, SW North Dakota, South Dakota and NW Wyoming. |