| original |
Aptian |
Albian |
South Dakota |
Cahoon,E.J. Lower Cretaceous pollen and spores from the Southern Black Hills |
1965 |
| details |
Kungurian |
|
China(Shensi) |
Kaiser,H. The Permian microflora of the Cathaysia Layers of Northwestern Shensi, China. |
1976 |
| details |
Stephanian |
|
France(Jura) |
Kaiser,H. The Permian microflora of the Cathaysia Layers of Northwestern Shensi, China. |
1976 |
| details |
Toarcian |
|
USSR(Ukrainian SSR) |
Semenova,E.V. Stratigraphy of the Upper Triassic Boundary in the North-West Part of the Don Basin. |
1979 |
| details |
Early Permian |
|
China(Kansu) |
Du,B.-A. Sporo-pollen assemblage from Sansi Formation of Pingliang, Gansu and its geological age. |
1986 |