| details |
Late Givetian |
Early Frasnian |
Canada(Alberta) |
McGregor,D.C. Palaeobotanical evidence for the age of Basal Devonian strata at Ghost River, Alberta, Canada. |
1963 |
| details |
Westphalian C |
Stephanian |
Canada(PEI) |
Barss,M.S. et al. Palynology and stratigraphy of some Upper Pennsylvanian and Permian rocks of the Maritime Provinces |
1963 |
| details |
Nd |
|
Nd |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 3 |
1960 |
| details |
Nd |
|
Nd |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 2 |
1958 |
| original |
Westphalian C |
|
Germany(Rhineland) |
Ibrahim,A.C. Spore forms of the Agir horizon of the Ruhr Basin. |
1933 |