| original |
Early Oligocene |
Middle Oligocene |
China(Hopei) |
Jiabo On the Paleogene dinoflagellates and acritarchs from the Coastal Region of Bohai. |
1978 |
| original |
Late Albian |
Middle Cenomanian |
Nigeria |
Lawal,O. Palynological biostratigraphy and paleoenvironments of Cretaceous Formations in the Upper Benue, northeast Nigeria. |
1982 |
| original |
Eocene |
|
China(Shantung) |
He,C.-Q. et al. Early Tertiary microphytoplankton from the Dongpu Region |
1989 |
| original |
Eocene |
|
China(Honan) |
He,C.-Q. et al. Early Tertiary microphytoplankton from the Dongpu Region |
1989 |