| details |
Nd |
|
Nd |
Butterworth,M.A. et al. Densosporites Berry 1937 and related genera. |
1963 |
| details |
Westphalian A |
|
Scotland |
Butterworth,M.A. Densosporites (Berry) Potonie and Kremp, and related genera. Report of CIMP Working Group No.2 |
1964 |
| details |
Westphalian A |
|
England |
Butterworth,M.A. Densosporites (Berry) Potonie and Kremp, and related genera. Report of CIMP Working Group No.2 |
1964 |
| details |
Westphalian A |
|
USA |
Butterworth,M.A. Miospore distribution in the Namurian and Westphalian. |
1964 |
| 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 |
Westphalian A |
|
England |
Balme,B.E. et al. The stratigraphical significance of certain fossil spores in the central group of British coalfields. |
1952 |
| details |
Westphalian A |
Westphalian C |
Scotland |
Alpern,B. et al. Provisional report of CIMP Group No.2 on Densosporites, (Berry), emended |
1962 |