| details |
Late Pennsylvanian |
|
Kentucky |
Peppers,R.A. Palynology of the McLeansboro Group of Illinois and equivalent strata of Western Kentucky |
1961 |
| original |
Allegheny |
|
Pennsylvania |
Frederiksen,N.O. Sporomorphs of the Brookville Seam near Brookville, Pennsylvania. |
1961 |
| details |
Early Desmoinesian |
|
New Mexico |
Carton,T.L. Pennsylvanian spores from the Sandia Formation, Santa Fe County, New Mexico. |
1959 |
| details |
Desmoinesian |
|
Oklahoma |
Wilson,L.R. et al. Plant microfossils of the Croweburg Coal. |
1956 |
| details |
Nd |
|
Oklahoma |
Hoffmeister,W.S. et al. Geologic range of Paleozoic plant spores in North America |
1955 |
| details |
Desmoinesian |
|
Iowa |
Schemel,M.P. Small spores of the Mystic Coal of Iowa. |
1951 |
| details |
Middle Pennsylvanian |
Late Pennsylvanian |
Illinois |
Kosanke,R.M. Pennsylvanian spores of Illinois and their use in correlation. |
1950 |
| original |
Desmoinesian |
|
Iowa |
Wilson,L.R. et al. Seven new species of unassigned plant microfossils from the Desmoines Series of Iowa. |
1944 |