| details |
Nd |
|
Nd |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 3 |
1960 |
| details |
Oligocene |
Late Pliocene |
Poland |
Stuchlik,L. Pollen analysis of the Miocene deposits at Rypin, (northwest of Warsaw). |
1964 |
| details |
Miocene |
|
Ecuador |
Putzer,H.Von. Tertiary Lignite in the Interandine Graben of Ecuador as an example of Syn-Orogenous Coal Formation in intramontane Depressions |
1968 |
| details |
Early Oligocene |
|
USSR(Ukrainian SSR) |
Zosimovich,V.Y. et al. The boundary between Upper Eocene and Oligocene in the Kiev Dnieper area as based on palynological data. |
1979 |