| details |
Late Eocene |
Oligocene |
USSR(Kazakh SSR) |
Zhezhel,O.N. The boundary between Eocene and Oligocene deposits at North Ustyurt (according to palynological data). (In: Palynology, Method and Stratigraphy) |
1973 |
| details |
Late Quaternary |
|
USSR(Pamirs) |
Zhezhel,O.N. Climate and vegetation changes of the Late Quaternary, lacustrine silt of the Aksu Valley (Eastern Pamir). (In: Paleomikrofitologicheskie issledovaniya dlya tselei stratigrafii. L.A. Panova, editor.) |
1980 |
| details |
Early Oligocene |
|
USSR(Kazakh SSR) |
Akhmeteev,M.A. et al. Upper Eocene Oligocene spore and pollen, plant macrofossils and phytoplankton in stratotypes of Tchegan and Astsheairyk Formations (North Usturt, Kazakhstan). |
1992 |