| original |
Westphalian B |
|
W.Germany(N.Rhine) |
Hagemann,H.W. Comparative micropetrographic and sporologic studies of the Zollverein 1-5 Seams from the Middle Essen Beds (Westfal B) of the Ruhrcarbons in reference to correlation of Seams. |
1966 |
| details |
Late Namurian |
Westphalian A |
Iowa |
Ravn,R.L. et al. A Morrowan, (Upper Carboniferous), miospore flora from eastern Iowa, USA. |
1982 |
| details |
Morrowan |
|
Iowa |
Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa |
1986 |
| details |
Morrowan |
|
Iowa |
Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa |
1986 |
| details |
Westphalian B |
|
W.Germany(N.Rhine) |
Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa |
1986 |