| original |
Middle Visean |
Late Visean |
Canada(Arctic) |
Utting,J. et al. Palynology of the Lower Carboniferous Emma Fiord Formation of Devon, Axel Heiberg and Ellesmere Islands, Canadian Arctic Archipelago. (In: Contributions to Canadian Paleontology.) |
1989 |
| details |
Late Visean |
|
Alaska |
Ravn,R.L. Miospores of the Kekiktuk Formation (Lower Carboniferous), Endicott Field Area, Alaska North Slope. |
1991 |
| details |
Middle Visean |
Late Visean |
Canada(Arctic) |
Ravn,R.L. Miospores of the Kekiktuk Formation (Lower Carboniferous), Endicott Field Area, Alaska North Slope. |
1991 |