| details |
Middle Oligocene |
Late Oligocene |
Bulgaria |
Chernyavska,S. Palynological studies on Paleogene deposits in South Bulgaria. |
1977 |
| details |
Middle Oligocene |
|
Celtic Sea |
Boulter,M.C. et al. A Middle Oligocene pollen and spore assemblage from the Briston Channel. |
1979 |
| details |
Oligocene |
|
N.Ireland |
Boulter,M.C. Irish Tertiary plant fossils in a European Context |
1980 |
| details |
Early Stampian |
|
France(Puy-de-Dome) |
Bodergat,A.M. et al. Marine ingressions in the Oligocene lacustrine environment of the Limagne Rift, (French Massif Central); Halophilous organisms and strontium isotopes, dating by mammals. |
1999 |