| details |
Aptian |
Santonian |
North America |
Lupia,R. Discordant morphological disparity and taxonomic diversity during the Cretaceous angiosperm radiation: North American pollen record. |
1999 |
| details |
Late Albian |
Early Cenomanian |
Canada(Ontario) |
Zippi,P.A. et al. Note; Recognition of a Cretaceous Outlier in Northwestern Ontario. |
1990 |
| details |
Late Turonian |
|
Canada(Alberta) |
Sweet,A.R. et al. Late Turonian marine and nonmarine palynomorphs from the Cardium Formation, North Central Alberta Foothills, Canada. (In: Sequences, stratigraphy, sedimentology; surface and subsurface. D.P.James and D.A.Leckie, editors) |
1988 |
| details |
Late Albian |
|
Kansas |
Ward,J.V. Early Cretaceous angiosperm pollen from the Cheyenne and Kiowa Formations, (Albian) of Kansas, USA. |
1986 |
| original |
Middle Cenomanian |
|
Canada(Alberta) |
Singh,C. Cenomanian microfloras of the Peace River area Northwestern Alberta |
1983 |