| original |
Early Devonian |
Middle Devonian |
Canada(Ontario) |
McGregor,D.C. Spores and other plant microfossils from selected Devonian sedimentary Formations of Canada |
1957 |
| original |
Middle Devonian |
Late Devonian |
Illinois |
Guennel,G.K. Devonian spores in a Middle Silurian Reef. |
1963 |
| details |
Late Eifelian |
Early Givetian |
Iowa |
Urban,J.B. Palynologic studies of the Devonian |
1968 |
| details |
Early Frasnian |
|
Canada(Arctic) |
Kerr,J.W. Geology of Bathurst Island Group and Byam Martin Island, Arctic Canada. |
1974 |
| original |
Early Devonian |
|
China(Kweichow) |
Kao,L. et al. Early and Middle Devonian spore assemblages from Tushan and Duyun of Kweichow and their stratigraphical significane. |
1975 |