| details |
Middle Pennsylvanian |
|
Iowa |
Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa |
1986 |
| details |
Middle Chesterian |
|
Kentucky |
Ettensohn,F.R. et al. Palynology and biostratigraphy of Pennington Shales and Coals (Chesterian) at selected sites in northeastern Kentucky. |
1979 |
| details |
Pennsylvanian |
|
Iowa |
Ravn,R.L. An introduction to the stratigraphic palynology of the Cherokee Group (Pennsylvanian) coals of Iowa. |
1979 |
| details |
Late Westphalian B |
|
Germany |
Smith,A.H.V. Genus Verrucosisporites, Ibrahim,1933, emend. |
1971 |
| details |
Namurian A |
|
Canada(Nova Scotia) |
Barss,M.S. Carboniferous and Permian spores of Canada. |
1967 |
| details |
Late Westphalian A |
Westphalian C |
Wales(Glamorgan) |
Sullivan,H.J. Distribution of miospores through coals and shales of the Coal Measures sequence exposed in Wernddu Claypit Caerphilly, (South Wales). |
1962 |
| details |
Westphalian B |
Westphalian D |
Wales |
Butterworth,M.A. et al. Descriptions of nine species of small spores from the British Coal Measures. |
1954 |
| details |
Westphalian B |
Westphalian D |
England |
Butterworth,M.A. et al. Descriptions of nine species of small spores from the British Coal Measures. |
1954 |