| original |
Wealden |
|
Belgium |
Delcourt,A.F. et al. Spores and pollen of the Wealdian of Hainaut. |
1955 |
| details |
Wealden |
|
Belgium |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 1 |
1956 |
| details |
Purbeckian |
|
France(Charente-Maritime) |
Lantz,J. Study of the spores and pollen of a Purbeckian sample from the Island of Oleron. |
1958 |
| details |
Wealden |
|
Belgium |
Delcourt,A.F. et al. Revision of some Lower Cretaceous microspores from Belgium. |
1963 |
| details |
Late Berriasian |
Early Hauterivian |
E.Germany |
Dжring,H. The stratigraphic classification of spores from the Lower Cretaceous of northern Central Europe. |
1966 |