| details |
Barstovian |
|
Wyoming |
Montagne,J. Cenozoic history of the Saratoga Valley area, Wyoming and Colorado. |
1991 |
| details |
Early Pliocene |
|
Wyoming |
Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains |
1972 |
| details |
Late Oligocene |
Early Miocene |
Colorado |
Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains |
1972 |
| details |
Late Tertiary |
|
USA(Rocky Mountains) |
Leopold,E.B. Late Cenozoic palynology. (In: Aspects of Palynology. R.H. Tschudy and R.A. Scott, editors) |
1969 |