| original |
Chesterian |
Springerian |
Utah |
Schemel,M.P. Carboniferous plant spores from Daggett County, Utah |
1950 |
| original |
Pennsylvanian |
|
Oklahoma |
Clarke,R.T. Palynology of the Secor Coal (Pennsylvanian) of Oklahoma |
1961 |
| original |
Missourian |
|
Oklahoma |
Miller,F.X. Spore analysis of the Dawson Coal |
1961 |
| original |
Desmoinesian |
|
Missouri |
Upshaw,C.F. et al. Pennsylvanian miospores from a cave deposit in Devonian Limestone, Callaway County, Missouri. |
1965 |
| original |
Chesterian |
Westphalian |
Sinai |
Saad,S.I. Pollen and spores recently discovered in the Coals of the Sinai Region. 2.Um Bogma District. |
1965 |
| original |
Desmoinesian |
|
Oklahoma |
Dolly,E.D. Palynology of the Bevier Coal (Pennsylvanian ) of Oklahoma. |
1965 |