| details |
Middle Eocene |
|
Wyoming |
Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains |
1972 |
| details |
Late Eocene |
|
New Mexico |
Leopold,E.B. et al. Development and affinites of Tertiary floras in the Rocky Mountains |
1972 |
| details |
Late Oligocene |
|
Alaska |
Wahrhaftig,C. et al. The coal-bearing group in the Nenana Coalfield, Alaska. |
1969 |
| details |
Late Oligocene |
|
Alaska |
Leopold,E.B. Late Cenozoic palynology. (In: Aspects of Palynology. R.H. Tschudy and R.A. Scott, editors) |
1969 |
| details |
Oligocene |
Late Neogene |
USA(Pacific Northwest) |
Leopold,E.B. Late Cenozoic palynology. (In: Aspects of Palynology. R.H. Tschudy and R.A. Scott, editors) |
1969 |
| details |
Miocene |
|
Maryland |
Leopold,E.B. Late Cenozoic palynology. (In: Aspects of Palynology. R.H. Tschudy and R.A. Scott, editors) |
1969 |
| details |
Claiborne |
|
Alabama |
Gray,J. Temperate pollen genera in the Eocene, (Claiborne), flora, Alabama. |
1960 |