| original |
Middle Albian |
|
Texas |
Srivastava,S.K. Microspores from the Fredericksburgh Group (Albian) of the southern United States. |
1975 |
| details |
Late Albian |
|
Texas |
Srivastava,S.K. Stratigraphic ranges of selected spores and pollen from the Fredericksburg Group, (Albian), of the southern United States. |
1981 |
| details |
Late Albian |
|
Oklahoma |
Srivastava,S.K. Stratigraphic ranges of selected spores and pollen from the Fredericksburg Group, (Albian), of the southern United States. |
1981 |
| details |
Early Cenomanian |
|
Czechoslovakia(Bohemia) |
SvobodovЎ,M. Palaeofloristic changes and facial differentiation during Cenomanian sedimentation in the SW part of Bohemian Cretaceous Basin. (In: Global Biological Events in Earth History. E.Knobloch and Z.Kvacek, editors) |
1990 |