| details |
Middle Pennsylvanian |
|
Iowa |
Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa |
1986 |
| details |
Middle Westphalian D |
|
Kentucky |
Hower,J.C. et al. Petrology and palynology of the No.5 Block Coal Bed, Northeastern Kentucky |
1994 |
| details |
Westphalian A |
|
Virginia |
Eble,C.F. Lower and Lower Middle Pennsylvanian coal palynofloras, southwestern Virginia. |
1996 |
| details |
Late Bolsovian |
|
Canada(Nova Scotia) |
Lyons,P.C. et al. Coal-Ball floras of Maritime Canada and palynology of the Foord Seam: Geologic, paleobotanical and paleoecological implications |
1997 |