| details |
Late Valanginian |
Hauterivian |
|
Aguirre-Urreta,M.B. et al. Advances in the biostratigraphy of the Agrio Formation (Lower Cretaceous) of the Neuqu©n Basin, Argentina: ammonites, palynomorphs and calcareous nannofossils. |
1999 |
| details |
Valanginian |
|
Germany(Brandenburg) |
Riding,J.B. et al. A taxonomic study of the dinoflagellate cyst Muderongia simplex Alberti 1961 and related species. |
2000 |
| details |
Early Hauterivian |
|
Poland |
Riding,J.B. et al. A taxonomic study of the dinoflagellate cyst Muderongia simplex Alberti 1961 and related species. |
2000 |
| details |
Hauterivian |
|
Poland |
Skupien,P. Contribution to stratigraphy of the Lower Cretaceous sediments of the Silesian Unit |
2004 |