| original |
Middle Senonian |
|
W.Germany(N.Rhine) |
Pflug,H.D. Origin and development of the angiosperm pollen in earth history |
1953 |
| details |
Middle Senonian |
|
Germany |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 1 |
1956 |
| details |
Early Oligocene |
|
W.Germany(Hesse) |
Pflug,H.D. On the age succession and facies correlation of Middle European, (in particular Hessen) Brown Coal. |
1957 |
| details |
Oligocene |
|
W.Germany(Hesse) |
Brosius,M. et al. The stratigraphic range of the Heskemer pollen-picture in Borken (Tertiary, Neiderhessen). |
1959 |