| original |
Late Pennsylvanian |
|
Illinois |
Peppers,R.A. Palynology of the McLeansboro Group of Illinois and equivalent strata of Western Kentucky |
1961 |
| original |
Late Pennsylvanian |
|
Kentucky |
Peppers,R.A. Palynology of the McLeansboro Group of Illinois and equivalent strata of Western Kentucky |
1961 |
| original |
Conemaugh |
Monongahela |
Kentucky |
Peppers,R.A. Spores in strata of Late Pennsylvanian cyclothems in the Illinois Basin. |
1964 |
| details |
Late Carboniferous |
|
Nd |
Alpern,B. et al. Logical bases and objective data for the classification of Monoletes. |
1970 |
| details |
Westphalian A |
Stephanian |
Romania |
Semaka,A.L. et al. A new location of Liassic plants in the Schela Formation, (South Carpathians). |
1972 |
| details |
Westphalian |
Stephanian |
Romania |
Givulescu,R. Fossil flora of Romania. (3rd Supplement) |
1978 |