original |
Late Campanian |
|
Canada(Alberta) |
Harland,R. Dinoflagellate cysts and acritarchs from the Bearpaw Formation, (Upper Campanian), of southern Alberta, Canada. |
1973 |
original |
Campanian |
|
Wyoming |
Harker,S.D. et al. Late Cretaceous (Campanian) organic-walled microplankton from the interior plains of Canada, Wyoming and Texas; biostratigraphy, palaeotology and palaeoenvironmental interpretation. |
1990 |
original |
Maastrichtian |
|
Canada(Saskatchewan) |
Harker,S.D. et al. Late Cretaceous (Campanian) organic-walled microplankton from the interior plains of Canada, Wyoming and Texas; biostratigraphy, palaeotology and palaeoenvironmental interpretation. |
1990 |
original |
Early Maastrichtian |
|
W.Germany(Niedersachsen) |
Marheinecke,U. Monograph on dinocysts, Acritarch and Chlorophyta of the Maestrichtian of Hemmor (Niedersachsen) |
1992 |