original |
Stephanian B |
Stephanian C |
Czechoslovakia |
Planderova,E. et al. Biostratigraphic evaluation of Graphiteous Shales in the Zemplin Inselberg area (Eastern Slovakia). |
1981 |
original |
Late Riphean |
|
Zaire |
Baudet,D. Implications of a palynological study in the Upper Precambrian from eastern Kasai and Northwestern Sahaba, Zaire. |
1987 |
original |
Coniacian |
Early Santonian |
Greenland |
Nиhr-Hansen,H. Dinoflagellate cyst biostratigraphy of the Upper Cretaceous Black Mudstones on Svartenhuk Halvo, western Greenland. |
1994 |
original |
Early Maestrichtian |
|
Arctic Ocean |
Firth,J.V. et al. An Early Maestrichtian organic-walled phytoplankton cyst assemblage from an organic-rich Black Mud in core Fl-533, Alpha Ridge: Evidence for upwelling conditions in the Cretaceous Arctic Ocean |
1998 |