| details |
Late Eocene |
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 |
| details |
Late Eocene |
|
USSR(Yamalo-Nenets) |
Lyubomirova,K.A. The palynological characteristics of the Chegansk horizon of North West Siberia. (In: Palynological Studies. Collected Articles. S.R.Samoilovich, editor) |
1976 |
| details |
Bartonian |
|
USSR(WSL) |
Kulkova,I.A. Eocene plant microfossils of West Siberia. (In: Mikrofitofossilii i stratigrafiya Mezozzoya i Kainozoya Sibiri. S.B. Shatskiy, editor) |
1988 |
| details |
Late Maestrichtian |
|
Russia(Siberia) |
Podobina,V.M. et al. Change of micropaleontological assemblages at the Cretaceous - Paleogene boundary in western Siberia. |
1997 |