| original |
Early Givetian |
|
Belgium |
Streel,M. An association of spores from the Lower Givetian of the Vesdre at Goe, Belgium. |
1964 |
| details |
Couvinian |
Givetian |
Belgium |
Streel,M. Palaeobotanic information on the Lower-Middle Devonian boundary in the Ardenno-Rhenean Geosyncline. |
1965 |
| details |
Early Givetian |
|
Belgium |
Streel,M. Lower Devonian spores from Belgium and their stratigraphic significance |
1967 |
| details |
Middle Devonian |
|
Belgium |
Streel,M. Paleobotanic information on the boundary of the Lower Devonian and Middle Devonian in the Ardenno-Rhenan Geosyncline. |
1967 |
| details |
Middle Givetian |
Early Frasnian |
Australia(W.Australia) |
Grey,K. A Middle Givetian miospore age for the onset of reef development on the Lennard Shelf, Canning Basin, Western Australia. |
1991 |