| original |
Cenomanian |
|
Utah |
May,F.E. A survey of palynomorphs from several coal-bearing horizons of Utah. |
1972 |
| original |
Maastrichtian |
|
Canada(NWT,Mackenzie) |
McIntyre,D.J. Palynology of an Upper Cretaceous section, Horton River, District of MacKenzie, N. W. T. |
1974 |
| original |
Turonian |
|
Nigeria |
Lawal,O. Palynological biostratigraphy and paleoenvironments of Cretaceous Formations in the Upper Benue, northeast Nigeria. |
1982 |
| original |
Turonian |
|
Nigeria |
Lawal,O. et al. Palynological biostratigraphy of Cretaceous sediments in the Upper Benue Basin, Northeast Nigeria. |
1986 |