| details |
Nd |
|
Nd |
Ravn,R.L. et al. The palynostratigraphy of the Dakota Formation, (?Late Albian-Cenomanian) in its type area, northwestern Iowa and northeastern Nebraska, USA. |
1995 |
| details |
Middle Albian |
Cenomanian |
France(Paris Basin) |
Fauconnier,D. The dinoflagellates of the Albian and Lower Cenomanian of the Paris Basin. |
1979 |
| details |
Cenomanian |
|
Minnesota |
Davies,E.H. The Anemiacean, Schizaeacean and related spores. An index to genera and species. |
1985 |
| original |
Cenomanian |
|
Minnesota |
Pierce,R.L. Lower Upper Cretaceous plant microfossils from Minnesota. |
1961 |