| link
|
From
|
To
|
Geolocation
|
Author - title
|
Year
|
|---|---|---|---|---|---|
| details | Early Frasnian | Middle Frasnian | Canada(Yukon) | Norris,A.W. Reconnaissance Devonian stratigraphy of northern Yukon Territory and Northwestern District of MacKenzie | 1968 |
| details | Early Devonian | Middle Devonian | Spitsbergen | Allen,K.C. Further information on the Lower and Middle Devonian spores from Dickson Land, Spitsbergen. | 1973 |