| details |
Westphalian C |
|
Germany(Rhineland) |
Wicher,C.A. IV. Spore forms in the Flame Coal of the Ruhr area |
1934 |
| details |
Westphalian C |
|
Germany(Rhineland) |
Wicher,C.A. IV. Spore forms in the Flame Coal of the Ruhr area |
1934 |
| details |
Carboniferous |
|
Poland |
Zerndt,J. An attempt at stratigraphic determination of Carpathian Coal Pebbles based on the study of megaspores. |
1932 |
| details |
Late Carboniferous |
|
W.Germany(N.Rhine) |
Stach,E. et al. Spores in the Flame, Gasflame and Gascoal of the Ruhr Coal. |
1931 |
| original |
Stephanian |
|
Poland |
Zerndt,J. Megaspores of a Seam at Libiaz (Stephanian). |
1930 |