| details |
Eocene |
Pontian |
USSR(European) |
Kaveev,T.S. On the northern shoreline of the Maikop Sea at the village of Romanovskay on the Don. |
1957 |
| details |
Late Pliocene |
|
USSR(Saratov) |
Vostryakov,A.V. Evidence of a Glacial climate in the Upper Pliocene of the Lower Volga |
1962 |
| details |
Late Oligocene |
|
USSR(Ukrainian SSR) |
Pelipenko,Y.M. Interpreting spore-pollen spectra of Continental deposits. |
1971 |
| details |
Late Miocene |
|
USSR(Ukrainian SSR) |
Pelipenko,Y.M. Interpreting spore-pollen spectra of Continental deposits. |
1971 |