| details |
Early Oligocene |
Late Oligocene |
Poland |
Odrzywolska-Bienkowa,E. et al. The Polish part of the northwest European Tertiary Basin. |
1981 |
| original |
Senonian |
|
Germany |
Krutzsch,W. Some new form genera and species of spores and pollen from the Middle European Upper Cretaceous and Tertiary |
1959 |
| details |
Middle Oligocene |
|
Poland |
Grabowska,I. et al. The age and origin of the Torun Clays from the vicinity of Toryn defined on the basis of palynological and lithological observations. (In: Research on Brown Coal Deposits in Poland, volume 5) |
1975 |
| details |
Oligocene |
|
Poland |
Grabowska,I. et al. Poland. (In: The Northwest European Tertiary Basin. R.Vinken, compiler) |
1988 |
| details |
Early Tertiary |
|
Europe |
Boulter,M.C. Palaeobotanical evidence for land-surface temperature in the European Palaeogene. (In: Fossils and Climate. P.Brenchley, editor) |
1984 |