| original |
Middle Frasnian |
|
France(Pas-de-Calais) |
Taugourdeau-Lantz,J. Spores from the Frasnian of an authorized region, the Boulonnais. |
1971 |
| details |
Late Devonian |
|
France(Ardennes) |
Brice,D. et al. Biostratigraphic details relative to the Upper Devonian of Ferques, (Boulonnais). |
1980 |
| details |
Middle Frasnian |
Famennian |
France(Ardennes) |
Loboziak,S. et al. Miospores in Middle - Upper Frasnian to Famennian sediments partly dated by conodonts, (Boulonnais, France). |
1981 |
| details |
Late Frasnian |
|
France(Boulonnais) |
Loboziak,S. et al. Miospores and acritarchs of the Hydrequent Formation (Upper Frasnian to Lower Famennian, Boulonnais, France). |
1983 |
| details |
Late Famennian |
Early Tournaisian |
England(Cornwall) |
Selwood,E.B. et al. A revision of the Upper Paleozoic stratigraphy of the Trevone Basin, North Cornwall, and its regional significance. |
1993 |