| details |
Middle Oligocene |
|
USSR(Siberia) |
Kulkova,I.A. et al. Eocene and Oligocene palynofloras and climate of Central Siberia. (In: Mikrofitofossilii i stratigrafiya Mezozzoya i Kainozoya Sibiri. S.B. Shatskiy, editor) |
1988 |
| details |
Late Oligocene |
|
USSR(Ukrainian SSR) |
Panova,L.A. The Oligocene of the West Siberian Lowland. (In: Cenozoic Flora of Siberia According to Palynological Data. V.N.Sacks and V.S.Volkova, editors) |
1971 |
| details |
Late Oligocene |
|
USSR(Ukrainian SSR) |
Stotland,A.B. Stratigraphic subdivision and age of Amber-bearing rocks in the northern Slope of the Ukrainian Crystalline Massif according to data of microphytofossil studies |
1990 |
| details |
Oligocene |
|
USSR(Irkutskaya Oblast) |
Laukhin,S.A. et al. Yenisei-Ridge sediments near the mouth of the Angara River. |
1976 |
| details |
Neogene |
|
Ukraine |
Mikhelis,A.A. The Neogene spore and pollen assemblages of the Donetz Basin |
1972 |
| details |
Early Miocene |
|
USSR(Kazakh SSR) |
Panova,L.A. et al. Palynostratigraphy of Neogene deposits. (In: Practical Palynostratigraphy. L.A. Panova et al, editors) |
1990 |