| details |
Givetian |
Frasnian |
England |
McGregor,D.C. Spores and the Middle-Upper Devonian boundary. |
1981 |
| details |
Frasnian |
|
Spitsbergen |
Murashov,L.G. et al. Stratigraphy of the Devonian sediments of Spitsbergen. (In: Geology of Svalbard.) |
1976 |
| details |
Frasnian |
|
England |
Mortimer,M.G. et al. The palynology of the Concealed Devonian rocks of Southern England. |
1972 |
| details |
Frasnian |
|
Spitsbergen |
Owens,B. et al. Some recent advances in Devonian palynology. A review. Report of CIMP Working Group No.13B. |
1972 |
| original |
Frasnian |
|
Spitsbergen |
Vigran,J.O. Spores from Devonian deposits, Mimerdalen, Spitsbergen |
1964 |