original |
Pennsylvanian |
|
Oklahoma |
Clarke,R.T. Palynology of the Secor Coal (Pennsylvanian) of Oklahoma |
1961 |
original |
Desmoinesian |
|
Oklahoma |
Davis,P.N. Palynology of the Rowe Coal (Pennsylvanian) of Oklahoma |
1961 |
original |
Desmoinesian |
|
Oklahoma |
Dempsey,J.E. A palynological investigation of the Lower and Upper Mcalester Coals (Pennsylvanian) of Oklahoma. |
1964 |
original |
Asselian |
|
Switzerland |
Hochuli,P.A. Palynostratigraphic classification and correlation of Permo-Carboniferous of northern Switzerland |
1985 |