| original |
Middle Oligocene |
Late Oligocene |
USSR(Ukrainian SSR) |
Aristova,K.E. Pollen and microplankton in ancient Eocene and Oligocene deposits of the Bakhehisaraisk Region of Crimeria. (In: Palynology and Stratigraphy of the Paleozoic, Mesozoic and Paleogene of the European Part of the USSR and Central Asia) |
1971 |
| details |
Miocene |
|
USSR(Tadzhik SSR) |
Dronov,V.I. et al. Stratigraphy and age of the Yuzhnokaradzhilginskoi series (P3-N1) of southeast Pamir. |
1986 |
| details |
Late Eocene |
Miocene |
USSR |
Vozzhennikova,T.F. et al. Cenozoic planktonic Paleoalgofloras of the Southern USSR. (In: Palynology in the USSR. A.F.Chlonova, editor) |
1988 |
| details |
Nd |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Middle Eocene |
Late Eocene |
USSR(Kazakh SSR) |
Zaporozhets,N.I. Palynocomplex and phytoplankton of the Upper Eocene and Oligocene sediments by stratigraphic Well N3006, (The North-West Priaralie). |
1991 |
| details |
Late Eocene |
|
USSR(Ukrainian SSR) |
Pasechnyi,G.V. et al. Stratigraphy and lithology of Neogene ore-bearing and underlying series of the Oligocene Nikopol Manganese Ore Basin. |
1992 |