| details |
Late Cretaceous |
Early Paleocene |
South Dakota |
Stanley,E.A. Upper Cretaceous and Lower Tertiary sporomorphae from Northwestern South Dakota. |
1961 |
| original |
Late Oligocene |
Early Miocene |
Japan(Yamaguchi Pref.) |
Takahashi,K. Analysis of the fossil pollen of the Hioki Layers of Waku and Kiwado. |
1963 |
| details |
Early Tertiary |
|
Montana |
Rouse,G.E. Palynological dating and paleoreconstruction of three gold and silver orebodies in the western Cordillera of Canada, United States and Mexico. (In: Palynology of Ore Deposits. E.I. Robbins, editor) |
1990 |