| original |
Chesterian |
|
Illinois |
Hoffmeister,W.S. et al. Mississippian plant spores from the Hardinsburg Formation of Illinois and Kentucky. |
1955 |
| original |
Chesterian |
|
Kentucky |
Hoffmeister,W.S. et al. Mississippian plant spores from the Hardinsburg Formation of Illinois and Kentucky. |
1955 |
| details |
Pottsville |
|
Indiana |
Guennel,G.K. Miospore analysis of the Pottsville Coals of Indiana. |
1958 |
| details |
Chesterian |
|
Illinois |
Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa |
1986 |
| details |
Early Namurian A |
|
China(Kansu) |
Wu,X.-Y. et al. New advances in the study of Carboniferous rocks of Jingyaun, Eastern Gansu |
1987 |