| details |
Early Aptian |
|
W.Germany(Niedersachsen) |
Batten,D.J. Megaspores from Lowermost Aptian Beds in northern Germany. (In: The Barremian-Aptian Boundary. A Study of profiles from the boreal Cretaceous.E.Kemper, editor) |
1995 |
| details |
Berriasian |
Barremian |
England |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| details |
Berriasian |
Early Aptian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| original |
Wealden |
|
Netherlands |
Dijkstra,S.J. Wealden megaspores and their stratigraphical value. |
1951 |