| details |
Siegenian |
Givetian |
Spitsbergen |
Allen,K.C. Lower and Middle Devonian spores of North and Central Vestspitsbergen |
1965 |
| details |
Emsian |
Givetian |
Spitsbergen |
Allen,K.C. Spore assemblages and their stratigraphical application in the Lower and Middle Devonian of North and Central Vestspitbergen |
1967 |
| details |
Early Devonian |
Middle Devonian |
Spitsbergen |
Allen,K.C. Further information on the Lower and Middle Devonian spores from Dickson Land, Spitsbergen. |
1973 |
| details |
Middle Carboniferous |
Late Carboniferous |
USSR(Kazakh SSR) |
Allen,K.C. Lower and Middle Devonian spores of North and Central Vestspitsbergen |
1965 |