original |
Portlandian |
Neocomian |
Madagascar |
Chen,Y.Y. Jurassic and Cretaceous palynostratigraphy in the Morondava Basin of Madagaskar. |
1978 |
original |
Late Callovian |
Early Kimmeridgian |
North Sea |
Herngreen,G.F.W. et al. Dinoflagellate, sporomorph, and micropaleontological zonation of Callovian to Ryazanian strata in the Central North Sea Graben, the Netherlands. |
1988 |
original |
Early Callovian |
Middle Callovian |
North Sea |
Herngreen,G.F.W. et al. Revision of the "Late Jurassic" stratigraphy of the Dutch Central North Sea Graben. |
1989 |