details |
Late Cretaceous |
|
Arizona |
Romans,R.C. Palynology of some Upper Cretaceous Coals of Black Mesa, Arizona |
1969 |
details |
Late Cenomanian |
|
Canada(Alberta) |
Singh,C. Stratigraphic significance of Early angiosperm pollen in the Mid-Cretaceous strata of Alberta. |
1975 |
details |
Late Cretaceous |
|
Arizona |
Romans,R.C. Palynology of some Upper Cretaceous Coals of Black Mesa, Arizona |
1975 |
details |
Cenomanian |
|
North America |
Lupia,R. Discordant morphological disparity and taxonomic diversity during the Cretaceous angiosperm radiation: North American pollen record. |
1999 |