| details |
Late Paleocene |
|
Wyoming |
Pocknall,D.T. et al. Palynology of Coal zones of the Tougue River Member (Upper Paleocene) of the Fort Union Formation, Powder River Basin, Montana and Wyoming |
1996 |
| details |
Late Paleocene |
|
Montana |
Pocknall,D.T. et al. Palynology of Coal zones of the Tougue River Member (Upper Paleocene) of the Fort Union Formation, Powder River Basin, Montana and Wyoming |
1996 |
| details |
Late Paleocene |
|
North Dakota |
Nichols,D.J. Biostratigraphy, Williston Basin. In: Resource assement of selected Tertiary coal beds and zone in the northern Rocky Mountains and Great Plains regions. |
1999 |