| details |
Late Oligocene |
|
USSR(Siberia) |
Volkova,V.S. et al. The climate of the Late Oligocene and Neogene (from paleobotanical data). (In: Climates of the Earth in the Geological Past. A.A.Velichko and A.L.Chepalyga, editors) |
1987 |
| details |
Late Oligocene |
Miocene |
USSR(Kazakh SSR) |
Panova,L.A. New data on Paleogene and Neogene spore pollen complexes of the Zaisan Depression, (Eastern Kazakhstan). (In: Biostratigraphical Symposium No.1.) |
1965 |
| details |
Middle Oligocene |
Late Oligocene |
USSR(Siberia) |
Levina,A.P. et al. Cenozoic deposits in the West and South-West of the Siberian Platform |
1980 |