details |
Namurian A |
|
Scotland(Fife) |
Butterworth,M.A. et al. The small spore floras of coals in the Limestone Coal Group and Upper Limestone Group of the Lower Carboniferous of Scotland |
1958 |
details |
Chesterian |
|
Kentucky |
Butterworth,M.A. et al. The small spore floras of coals in the Limestone Coal Group and Upper Limestone Group of the Lower Carboniferous of Scotland |
1958 |
details |
Chesterian |
|
Canada(Alberta) |
Halbertsma,H.L. Nomenclature of Upper Carboniferous and Permian strata in the subsurface of the Peace River area |
1957 |