| original |
Late Albian |
|
Kansas |
Ward,J.V. Early Cretaceous angiosperm pollen from the Cheyenne and Kiowa Formations, (Albian) of Kansas, USA. |
1986 |
| details |
Middle Albian |
Late Albian |
Canada(British Columbia) |
Sweet,A.R. Appendix 6. Palynology. (In: Stratigraphy and sedimentology of the Lower Cretaceous Hulcross and Boulder Creek Formations, Northeastern British Columbia.) |
1992 |
| details |
Early Cenomanian |
Turonian |
Canada(Yukon) |
Nichols,D.J. et al. Biostratigraphy of Upper Cretaceous non-marine palynofloras in a north-south transect of the Western Interior Basin. (In: Evolution of the Western Interior Basin) |
1993 |
| details |
Albian |
|
North America |
Lupia,R. Discordant morphological disparity and taxonomic diversity during the Cretaceous angiosperm radiation: North American pollen record. |
1999 |