| details |
Late Eocene |
|
Bulgaria |
Chernyavska,S. Spore-pollen zones in certain Old Tertiary Coal bearing sediments in Bulgaria. |
1970 |
| details |
Late Eocene |
|
Bulgaria |
Ivanov,R. et al. Geological, petrographic and palynological data on the age of the Palaeogene Volcanic activity in Western Bulgaria.2. The Paleogene of Kamenica. |
1971 |
| details |
Late Sparnacian |
|
France(Paris Basin) |
Gruas-Cavagnetto,C. Palynological study of the Defense borehole (Paris). |
1976 |
| original |
Middle Eocene |
|
W.Germany(Hesse) |
Krutzsch,W. Micropaleontologic (spore paleontology), investigation of the Brown Coal of the Geiseltal. |
1959 |
| details |
Middle Oligocene |
|
Germany |
Pflug,H.D. Remarks on spore stratigraphy in the Later Tertiary |
1965 |