| details |
Late Oligocene |
|
USSR(WSL) |
Boytsova,E.P. Fossil pollen of the Quercus species and its importance for the subdivision of the Paleogene deposits of the of the Western Siberian Lowland and western Kazakhstan. (In: On the Methods in Paleopalynological Studies.) |
1966 |
| details |
Middle Oligocene |
|
USSR(Ukrainian SSR) |
Blank,M.Y. et al. On Upper Eocene and Oligocene Formations of the north-eastern Ukraine. |
1980 |
| original |
Early Oligocene |
Middle Oligocene |
USSR(Siberia) |
Andreeva,E.M. et al. Palaeopalynology. (Three Volumes: Volume I: Methods. Volume II: Complexes of palynomorphs of the Precambrian-Holocene of the USSR. Volume III: Figures and Plates. Editor-I.M. Pokrovskaya) |
1966 |
| details |
Chattian |
|
USSR(Tomskaya Oblast) |
Aleksandrova,L.V. Stratigraphy of Eocene to Lower Miocene deposits of Western Tomskaya Oblast, based on palynology. (In: Stratigraphy and Palynology of the Mesozoic and Cenozoic of Siberia. V.S.Volkova, editor) |
1979 |
| details |
Chattian |
|
USSR(Tomskaya Oblast) |
Aleksandrova,L.V. Stratigraphy of Eocene to Lower Miocene deposits of Western Tomskaya Oblast, based on palynology. (In: Stratigraphy and Palynology of the Mesozoic and Cenozoic of Siberia. V.S.Volkova, editor) |
1979 |
| details |
Oligocene |
|
USSR(Siberia) |
Aleksandrova,A.N. et al. Palynoflora of Central Siberia at the Eocene-Oligocene Border |
1985 |