| original |
Cenomanian |
|
Minnesota |
Pierce,R.L. Lower Upper Cretaceous plant microfossils from Minnesota. |
1961 |
| details |
Late Cretaceous |
|
Utah |
Kidson,E.J. Palynology and paleoecology of the Buck Tongue of the Mancos Shale, (Upper Cretaceous), from East Central Utah and Western Colorado. |
1971 |
| details |
Late Cretaceous |
|
Colorado |
Kidson,E.J. Palynology and paleoecology of the Buck Tongue of the Mancos Shale, (Upper Cretaceous), from East Central Utah and Western Colorado. |
1971 |
| details |
Cenomanian |
|
Minnesota |
Davies,E.H. The Anemiacean, Schizaeacean and related spores. An index to genera and species. |
1985 |