original |
Early Valanginian |
|
England |
Davey,R.J. Dinocysts stratigraphy of the latest Jurassic to Early Cretaceous of the Haldager No.1 borehole, Denmark. |
1982 |
original |
Early Valanginian |
|
North Sea |
Birkelund,T. et al. The Hectoroceras kochi Zone, (Ryazanian), in the North Sea Central Graben and remarks on the Late Cimmerian Unconformity. |
1982 |
original |
Late Volgian |
Early Hauterivian |
North Sea |
Heilmann-Clausen,C. Lower Cretaceous dinoflagellate biostratigraphy in the Danish Central Trough |
1987 |
original |
Early Valanginian |
Late Valanginian |
Spain |
Leereveld,H. Upper Tithonian - Valanginian (Upper Jurassic - Lower Cretaceous) dinoflagellate cyst stratigraphy of the western Mediterranean. |
1997 |
original |
Early Ryazanian |
Early Valanginian |
North Sea |
Dybkjaer,K. Palynological dating of the Mandal Formation (Uppermost Jurassic - Lowermost Cretaceous, Norwegian Central Graben) and correlation to organic-rich shales in the Danish sector. |
1998 |