| original |
Siegenian |
|
Canada(Gaspe Area) |
McGregor,D.C. et al. Devonian spores of eastern and northern Canada. |
1966 |
| 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 |
Devonian |
|
Canada |
McGregor,D.C. et al. Canadian and Australian Devonian spores: zonation and correlation |
1992 |
| details |
Devonian |
|
Australia |
McGregor,D.C. et al. Canadian and Australian Devonian spores: zonation and correlation |
1992 |
| details |
Middle Carboniferous |
Middle Permian |
Argentina |
Azcuy,C.L. Possible paleoecological significance of Gondwanic microfloras of the Upper Paleozoic, specially of Argentina. |
1978 |