| details |
Desmoinesian |
|
Illinois |
Peppers,R.A. Correlation and palynology of coals in the Carbondale and Spoon Formations (Pennsylvanian) of the northeastern part of the Illinois Basin. |
1970 |
| details |
Middle Pennsylvanian |
|
Illinois |
Peppers,R.A. Correlation and palynology of coals in the Carbondale and Spoon Formations (Pennsylvanian) of the northeastern part of the Illinois Basin. |
1970 |
| details |
Pennsylvanian |
|
Illinois |
Potonie,R. Synopsis of the genera of the sporae dispersae.Part 7 |
1975 |
| details |
Middle Pennsylvanian |
|
Illinois |
Mahaffy,J.F. Vegetational history of the Springfield Coal (Middle Pennsylvanian of Illinois) and distribution patterns of a Tree-Fern miospore, Thymospora pseudothiessenii, based on miospore profiles |
1988 |
| details |
Late Carboniferous |
|
USA |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |