| original |
Middle Callovian |
Late Callovian |
Norway(Offshore) |
…rhus,N. et al. Biostratigraphy of some Callovian and Oxfordian cores off Vega, Helgeland, Norway |
1989 |
| details |
Middle Callovian |
Late Callovian |
Norway(Offshore) |
Lentin,J.K. et al. Fossil dinoflagellates: index to genera and species. 1993 edition. |
1993 |
| details |
Early Callovian |
|
W.Germany(Baden) |
Smelror,M. et al. Dinoflagellates cysts of the Bathonian/Callovian boundary Beds in Southern Germany |
1994 |
| details |
Nd |
|
Nd |
Williams,G.L. et al. The Lentin and Williams Index of Fossil Dinoflagellates.1998 Edition. |
1998 |