| original |
Late Cretaceous |
Paleocene |
South Dakota |
Stanley,E.A. Upper Cretaceous and Paleocene plant microfossils and Paleocene dinoflagellates and hystrichosphaerids from northwestern South Dakota. |
1965 |
| details |
Paleocene |
|
Wyoming |
Pocknall,D.T. et al. Coal palynology and sedimentaology in the Tongue River Member, Fort Union Formation, Powder River Basin, Wyoming. |
1987 |
| details |
Paleocene |
|
Wyoming |
Moore,T.A. et al. Maceral and palynomorph facies from two Tertiary peat-forming environments in the Powder River Basin, USA. |
1990 |