| details |
Late Oligocene |
|
Vermont |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 3 |
1960 |
| details |
Nd |
|
Nd |
Kedves,M. Paleogene fossil sporomorphs of the Bakony Mountains.Part 3. |
1978 |
| details |
Nd |
|
Nd |
Eyde,R.H. Nyssa-like fossil pollen: A case for stabilizing nomenclature. |
1991 |
| details |
Late Eocene |
Early Oligocene |
Canada(Yukon) |
Long,D.G.F. et al. Age and depositional environment of the rock River Coal Basin, Yukon Territory, Canada. |
1994 |
| details |
Early Miocene |
|
Vermont |
Traverse,A. Palynofloral geochronology of the Brandon Lignite of Vermont, USA. |
1994 |
| details |
Middle Eocene |
Late Eocene |
Canada(Yukon) |
Ridgway,K.D. et al. Climatically induced floristic changes across the Eocene - Oligocene transition in the northern high latitudes, Yukon Territory, Canada. |
1995 |
| details |
Early Eocene |
Middle Eocene |
Alaska(North Slope) |
Frederiksen,N.O. et al. Palynology of Eocene strata in the Sagavanirktok and Canning Formations on the North Slope of Alaska. |
2002 |