| details |
Late Eocene |
Early Oligocene |
USSR |
Krutzsch,W. Atlas of Middle and Upper Tertiary dispersed spores and pollen as well as microplankton of northern Middle Europe 6. Coniferae pollen (Saccites and Inaperturates) |
1971 |
| details |
Oligocene |
|
USSR(Irkutskaya Oblast) |
Laukhin,S.A. et al. Yenisei-Ridge sediments near the mouth of the Angara River. |
1976 |
| details |
Late Oligocene |
|
USSR(Khanty-Mansiysk) |
Volkova,V.S. et al. Palynological characteristic and stratigraphy of Cainozoic deposits from Khanty-Mansijsk area. (In: Mikrofitofossilii i stratigrafiya Mezozzoya i Kainozoya Sibiri. S.B. Shatskiy, editor) |
1988 |