| original |
Springerian |
|
Oklahoma |
Felix,C.J. et al. Palynology of the Springer Formation of southern Oklahoma, USA. |
1967 |
| details |
Westphalian B |
|
China(Shanghai) |
Gao,L. Carboniferous spore assemblages in China. (In: Biostratigraphy. P.K.Sutherland and W.L.Manger, editors) |
1984 |
| details |
Early Permian |
|
China(Kansu) |
Du,B.-A. Sporo-pollen assemblage from Sansi Formation of Pingliang, Gansu and its geological age. |
1986 |
| details |
Early Langsettian |
Late Yeadonian |
England(Derbyshire) |
Turner,N. et al. A palynostratigraphic study of Namurian-Westphalian Deltaic Sequences of the Southern Central Pennine Basin, Derbyshire England. |
1993 |