| original |
Namurian A |
|
Scotland(Fife) |
Knox,E.M. The spores of Lycopodium, Phylloglossum, Selaginella and Isoetes and their value in the study of microfossils of Paleozoic age. |
1950 |
| details |
Westphalian A |
Westphalian B |
Wales |
Butterworth,M.A. et al. Descriptions of nine species of small spores from the British Coal Measures. |
1954 |
| details |
Westphalian A |
Westphalian B |
England |
Butterworth,M.A. et al. Descriptions of nine species of small spores from the British Coal Measures. |
1954 |
| details |
Late Carboniferous |
|
England(Staffordshire) |
Butterworth,M.A. et al. Microspore distribution in the Seams of the North Staffofdshire, Cannock Chase and North Wales Coalfields |
1954 |
| details |
Late Carboniferous |
|
Wales |
Butterworth,M.A. et al. Microspore distribution in the Seams of the North Staffofdshire, Cannock Chase and North Wales Coalfields |
1954 |
| details |
Carboniferous |
|
England(Yorkshire) |
Smith,A.H.V. The sequence of microspore assemblages associated with the occurrence of Crassidurite in Coal Seams of Yorkshire. |
1957 |
| 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 |
Westphalian A |
|
England(Durham) |
Butterworth,M.A. et al. Densosporites Berry 1937 and related genera. |
1963 |
| details |
Namurian A |
|
Scotland(Fife) |
Butterworth,M.A. et al. Densosporites Berry 1937 and related genera. |
1963 |
| details |
Visean |
Stephanian |
Europe |
Butterworth,M.A. Densosporites (Berry) Potonie and Kremp, and related genera. Report of CIMP Working Group No.2 |
1964 |
| details |
Visean |
Stephanian |
Turkey |
Butterworth,M.A. Densosporites (Berry) Potonie and Kremp, and related genera. Report of CIMP Working Group No.2 |
1964 |
| details |
Visean |
Stephanian |
USA |
Butterworth,M.A. Densosporites (Berry) Potonie and Kremp, and related genera. Report of CIMP Working Group No.2 |
1964 |