| details |
Middle Purbeckian |
Late Purbeckian |
Netherlands |
Allen,P. et al. Correlation of northwest European Purbeck-Wealden, (nonmarine Lower Cretaceous), as seen from the English type areas |
1991 |
| details |
Middle Purbeckian |
Late Purbeckian |
W.Germany(Niedersachsen) |
Allen,P. et al. Correlation of northwest European Purbeck-Wealden, (nonmarine Lower Cretaceous), as seen from the English type areas |
1991 |
| details |
Cretaceous |
|
England |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |