original |
Early Valanginian |
|
Denmark |
Davey,R.J. Dinocysts stratigraphy of the latest Jurassic to Early Cretaceous of the Haldager No.1 borehole, Denmark. |
1982 |
original |
Middle Volgian |
Early Valanginian |
North Sea |
Heilmann-Clausen,C. Lower Cretaceous dinoflagellate biostratigraphy in the Danish Central Trough |
1987 |
original |
Hauterivian |
Barremian |
|
Peralta,P.I. New records of marine dinoflagellates in the Agrio Formation (Early Cretaceous), Cerro Negro Covunco, Neuqu©n Basin, Argentina |
1996 |
original |
Hauterivian |
Aptian |
|
Peralta,P.I. et al. Paleoenvironmental aspects of the Lower Cretaceous Agrio Format Inferred by dinocyst assemblages Neuqu©n Basin, Argentina |
1997 |