| details |
Oligocene |
|
USSR(Kazakh SSR) |
Bronevoy,V.A. et al. New data on the stratigraphy of the Paleogene of the northern Aral Region. |
1963 |
| details |
Late Eocene |
Early Oligocene |
USSR(Siberia) |
Lyubomirova,K.A. The vegetation of northwest Siberia in the Late Paleogene. (In: Palynology in Petroleum Geology. N.M.Ivanova, editor) |
1971 |
| details |
Middle Eocene |
|
USSR(Kazakh SSR) |
Boytsova,E.P. et al. On the methodology of separation and correlation of sedimentary deposits on palynologicla evidence. (In: Methodical problems of Palinology-A.M.Medvedeva-Ed) |
1973 |
| details |
Late Eocene |
|
USSR(Kazakh SSR) |
Abuzyarova,R.Y. New facts about the Paleogene flora Shintuzsy (Central Kazakhstan). |
1973 |
| details |
Late Eocene |
|
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 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 |
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 |