| details |
Oligocene |
|
USSR(Kazakh SSR) |
Bronevoy,V.A. et al. New data on the stratigraphy of the Paleogene of the northern Aral Region. |
1963 |
| original |
Early Oligocene |
Middle Oligocene |
USSR(Kazakh SSR) |
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 |
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 |
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 |
Middle Eocene |
Late Neogene |
USSR(Ukrainian SSR) |
Mikhelis,A.A. The significance of Carya, Juglans and Pterocarya in the Paleogene and Neogene floras of the Donetsk Basin. |
1988 |