| details |
Early Ypresian |
|
W.Germany(Niedersachsen) |
Heilmann-Clausen,C. et al. Dinoflagellate zonation of the Uppermost Paleocene? to Lower Miocene in the Wursterheide research well, northwest Germany |
1989 |
| original |
Late Oligocene |
|
W.Germany(N.Rhine) |
Benedek,P.N. Phytoplanktons from the Middle and Upper Oligocene of Tonisberg, (Lower Rhine area). |
1972 |
| original |
Middle Oligocene |
|
W.Germany(N.Rhine) |
Benedek,P.N. Phytoplanktons from the Middle and Upper Oligocene of Tonisberg, (Lower Rhine area). |
1972 |
| original |
Middle Oligocene |
Middle Miocene |
W.Germany(Niedersachsen) |
Gerlach,E. Oligocene and Miocene microfossils of Northwestern Germany, with special consideration of Hystrichospheres and dinoflagellate. |
1961 |