details |
Late Albian |
Cenomanian |
South Dakota |
Ravn,R.L. The spore and pollen succession of the type Dakota Formation, (?Late Albian -Cenomanian), of the North Central United States; Comparisons and lithostratigraphic implications. |
1990 |
details |
Late Albian |
Cenomanian |
South Dakota |
Ravn,R.L. The spore and pollen succession of the type Dakota Formation (?Late Albian - Cenomanian) of the north central United States; comparisions and lithostratigraphic implications. |
1991 |
details |
Late Albian |
Cenomanian |
Nebraska |
Ravn,R.L. The spore and pollen succession of the type Dakota Formation, (?Late Albian -Cenomanian), of the North Central United States; Comparisons and lithostratigraphic implications. |
1990 |
details |
Late Albian |
Cenomanian |
Nebraska |
Ravn,R.L. The spore and pollen succession of the type Dakota Formation (?Late Albian - Cenomanian) of the north central United States; comparisions and lithostratigraphic implications. |
1991 |
details |
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 |
Iowa |
Ravn,R.L. The spore and pollen succession of the type Dakota Formation, (?Late Albian -Cenomanian), of the North Central United States; Comparisons and lithostratigraphic implications. |
1990 |
details |
Late Albian |
Cenomanian |
Iowa |
Ravn,R.L. The spore and pollen succession of the type Dakota Formation (?Late Albian - Cenomanian) of the north central United States; comparisions and lithostratigraphic implications. |
1991 |
details |
Late Albian |
Early Cenomanian |
Egypt |
El-Beialy,S.Y. Palynological investigations Cretaceous sediments in the Abu El Charadiq Oil Field, Western Desert, Egypt. |
1994 |
details |
Late Albian |
Early Cenomanian |
Egypt |
El-Beialy,S.Y. Palynological investigations Cretaceous sediments in the Abu El Charadiq Oil Field, Western Desert, Egypt. |
1994 |
details |
Late Albian |
|
Canada(British Columbia) |
Thorkelson,D.J. et al. Revised stratigraphic nomenclature and age determinations for Mid-Cretaceous volcanic rocks in Southwestern British Columbia. |
1989 |
original |
Middle Cenomanian |
|
Canada(Alberta) |
Singh,C. Cenomanian microfloras of the Peace River area Northwestern Alberta |
1983 |