| details |
Late Eocene |
Early Oligocene |
USSR(Ukrainian SSR) |
Stotland,A.B. On the stratigraphic position of the Khar'kovsk series in the Kiev Pre-Dnieper |
1985 |
| details |
Early Ypresian |
|
W.Germany(Schleswig) |
Fechner,G.G. et al. Early Eocene spores, pollen and microplancton assemblages from Fehmarn Island, North Germany. |
1988 |
| details |
Miocene |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Late Eocene |
|
USSR(Ukrainian SSR) |
Savitskaya,N. Correlation of Middle-Upper Eocene sediments in the Kiev Pre-Dnieper Region by Dinoysts and Nannoplankton |
1993 |