| original |
Pennsylvanian |
|
Oklahoma |
Urban,L.L. Palynology of the Drywood and Bluejacket Coals (Pennsylvanian) of Oklahoma. |
1965 |
| details |
Middle Pennsylvanian |
|
Oklahoma |
Dolly,E.D. Palynology of the Bevier Coal (Pennsylvanian ) of Oklahoma. |
1965 |
| details |
Pennsylvanian |
|
Oklahoma |
Wilson,L.R. et al. Circlettisporites Miller,1966, a synonym of Leschikisporis, Potonie, 1958. |
1967 |
| details |
Middle Pennsylvanian |
Late Pennsylvanian |
Illinois |
Wilson,L.R. et al. Circlettisporites Miller,1966, a synonym of Leschikisporis, Potonie, 1958. |
1967 |
| details |
Pennsylvanian |
|
Iowa |
Ravn,R.L. An introduction to the stratigraphic palynology of the Cherokee Group (Pennsylvanian) coals of Iowa. |
1979 |
| details |
Morrowan |
Desmoinesian |
Iowa |
Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa |
1986 |