| 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 Oligocene |
|
Canada(British Columbia) |
Piel,K.M. Palynology of Oligocene sediments from Central British Columbia |
1971 |
| details |
Oligocene |
Miocene |
France(Rhone) |
Schuler,M. et al. Palynological and ecological study of the Tertiary series of the Montbrison Basin (Massie Central Francias). |
1969 |
| original |
Oligocene |
Miocene |
Europe |
Krutzsch,W. Atlas of Middle and Upper Tertiary dispersed spores and pollen as well as microplankton of northern Middle Europe.3.Shagnaceoid and Selaginellaceoid spore forms. |
1963 |