| original |
Campanian |
Maastrichtian |
Colorado |
Newman,K.R. Upper Cretaceous-Paleocene guide palynomorphs from Northwestern Colorado. |
1965 |
| details |
Campanian |
|
Nd |
Lentin,J.K. et al. Fossil dinoflagellates: index to genera and species. |
1973 |
| details |
Maastrichtian |
|
Canada(Alberta) |
Srivastava,S.K. Genus Sigmopollis from the Maestrichtian Scollard Formation, Alberta, (Canada), and its algal affinity. |
1984 |
| details |
Campanian |
Maastrichtian |
Colorado |
Srivastava,S.K. Genus Sigmopollis from the Maestrichtian Scollard Formation, Alberta, (Canada), and its algal affinity. |
1984 |