| details |
Villafranchian |
|
Romania |
Givulescu,R. The fossil flora of Roumania; Second Supplement, first Part. |
1973 |
| 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 |
| details |
Late Eocene |
Early Oligocene |
Kazakstan |
Krasheninnikov,V.A. et al. Reference sections of the Eocene - Oligocene boundary strata on the territory of the former Soviet Union. The Northern Ustyurt sections (the Sandal Mountain and Aszeiryk Ravine, Western Kazakhstan). (In: Late Eocene-Early Oligocene geological and Biotical events on the Territory of the Former Soviet Union.Part 2: the regional geology of the Upper Eocene and ower Oligocene. V.A.Krasheninnikov and M.A.Akhmetiev, editors) |
1996 |