| details |
Early Cenomanian |
Middle Cenomanian |
Iowa |
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 |
Late Albian |
Early Cenomanian |
Iowa |
Ravn,R.L. et al. The Mid-Cretacous boundary in the western interior seaway, central United States: Implications of palynostratigraphy from the type Dakota Formation. (In: Perspectives on the eastern Margin of the Cretaceous Western Interior Basin. G.W. Shurr et al, editors) |
1994 |
| details |
Late Albian |
Cenomanian |
France(Charente-Maritime) |
Ravn,R.L. Microreticulatisporites sacalii (Deak and Combaz), n.comb., a stratigraphically significant miospore from the Cenomanian of the United States |
1986 |
| details |
Cenomanian |
|
Iowa |
Ravn,R.L. Microreticulatisporites sacalii (Deak and Combaz), n.comb., a stratigraphically significant miospore from the Cenomanian of the United States |
1986 |
| details |
Cenomanian |
|
Louisiana |
Ravn,R.L. Microreticulatisporites sacalii (Deak and Combaz), n.comb., a stratigraphically significant miospore from the Cenomanian of the United States |
1986 |
| details |
Cenomanian |
|
Mississippi |
Ravn,R.L. Microreticulatisporites sacalii (Deak and Combaz), n.comb., a stratigraphically significant miospore from the Cenomanian of the United States |
1986 |
| details |
Late Albian |
|
Wyoming |
Ravn,R.L. Miospores from the Muddy Sandstone, (Upper Albian), Wind River Basin, Wyoming, USA. |
1995 |