| original |
Volgian |
Ryazanian |
North Sea |
Davey,R.J. et al. Stratigraphic range charts, diagnostic dinocysts, Cretaceous. |
1977 |
| original |
Volgian |
Ryazanian |
United Kingdom |
Duxbury,S. Early Cretaceous dinoflagellate cysts. (In: Distribution of Biostratigraphically diagnostic dinoflagellate cysts and miospores from the Northwest European continental shelf and adjacent areas. B.Thusu, editor) |
1978 |
| original |
Berriasian |
|
Canada(Eastern Offshore) |
Edson,G.M. et al. EXXON Lydonia Canyon Block 133 No.1 Well. Geological and Operational Summary |
2000 |