| details |
Paleocene |
|
Montana |
Nichols,D.J. et al. Latest Cretaceous and Early Tertiary history of vegetation in the Powder River Basin, Montana and Wyoming. (In: Geological Society of America-Centennial Meeting Field Trip Guidebook. G.S. Holden, editor) |
1988 |
| details |
Paleocene |
|
Wyoming |
Nichols,D.J. et al. Latest Cretaceous and Early Tertiary history of vegetation in the Powder River Basin, Montana and Wyoming. (In: Geological Society of America-Centennial Meeting Field Trip Guidebook. G.S. Holden, editor) |
1988 |
| 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 |