original |
Maastrichtian |
Danian |
Utah |
May,F.E. A survey of palynomorphs from several coal-bearing horizons of Utah. |
1972 |
original |
Cretaceous |
Tertiary |
China(Kiangsu) |
Song,Z.-C. et al. Cretaceous-Tertiary palynological assemblages from Jiangsu. |
1981 |
original |
Maastrichtian |
|
Nigeria |
Lawal,O. Palynological biostratigraphy and paleoenvironments of Cretaceous Formations in the Upper Benue, northeast Nigeria. |
1982 |
original |
|
|
Nigeria |
Lawal,O. et al. Palynological biostratigraphy of Cretaceous sediments in the Upper Benue Basin, Northeast Nigeria. |
1986 |
original |
Middle Eocene |
|
China(Szechwan) |
Zhang,Y. et al. Late Cretaceous and Early Tertiary Spores and pollen from the Western Tarim Basin, southern Xinjiang, China. |
1991 |
original |
Maastrichtian |
|
Wyoming |
Nichols,D.J. et al. A new Cretaceous-Tertiary boundary locality in the Western Powder River Basin, Wyoming; Biological and geological implications. |
1992 |