| details |
Middle Givetian |
Late Givetian |
Greenland |
Friend,P.F. et al. Devonian sediments of East Greenland. VI. Review of results. |
1983 |
| details |
Late Eifelian |
Early Givetian |
Iowa |
Urban,J.B. Palynologic studies of the Devonian |
1968 |
| details |
Late Devonian |
|
Romania |
Venkatachala,B.S. et al. Devonian microfossils from the Calarasi Zone of the Moesic Platform, Rumania. |
1968 |
| original |
Frasnian |
|
Canada(NWT,Franklin) |
McGregor,D.C. Devonian spores from Melville Island, Canadian Arctic Archipelago. |
1960 |
| original |
Late Devonian |
|
Canada(Ontario) |
McGregor,D.C. Spores and other plant microfossils from selected Devonian sedimentary Formations of Canada |
1957 |