| original |
Stephanian |
|
Pennsylvania |
Clendening,J.A. Schopfipollenites in the Washington Formation, Dunkard Group, Upper Pennsylvanian of West Virginia and Pennsylvania. |
1967 |
| details |
Stephanian B |
Stephanian C |
USA |
Clendening,J.A. Sporological evidence on the geological age of the Dunkard strata in the Appalachian Basin. |
1970 |
| details |
Wolfcampian |
|
Arizona |
Blazey,E.B. Fossil flora of the Mogollon Rim |
1971 |
| details |
Late Pennsylvanian |
|
Pennsylvania |
Clendening,J.A. Stratigraphic placement of the Dunkard according to palynological assemblages. |
1972 |
| details |
Late Pennsylvanian |
|
West Virginia |
Clendening,J.A. Stratigraphic placement of the Dunkard according to palynological assemblages. |
1972 |
| details |
Late Pennsylvanian |
|
West Virginia |
Clendening,J.A. Palynological evidence for a Pennsylvanian age assignment of the Dunkard Group in the Appalachian Basin. |
1974 |
| details |
Pennsylvanian |
|
Pennsylvania |
Clendening,J.A. Palynological evidence for a Pennsylvanian age assignment of the Dunkard Group in the Appalachian Basin. |
1974 |
| details |
Pennsylvanian |
Early Permian |
Kansas |
Clendening,J.A. Palynological evidence for placement of the Pennsylvanian-Permian boundary in Kansas, USA. |
1975 |
| details |
Autunian |
|
Spain |
Sopeбa,A. et al. The Permian and Triassic of the southeastern border of the Sistema Central. |
1977 |
| details |
Autunian |
|
Spain |
Sopeбa,A. Stratigraphy of the Permian and Triassic of the North East of Guadalajara Province |
1979 |