| original |
Early Westphalian D |
|
Germany(Rhineland) |
Bharadwaj,D.C. The spore flora of Velener Schichten (Lower Westphalian D) in the Ruhr Coal Measures. |
1957 |
| details |
Allegheny |
|
Pennsylvania |
Frederiksen,N.O. Sporomorphs of the Brookville Seam near Brookville, Pennsylvania. |
1961 |
| details |
Westphalian B |
Rotliegendes |
Poland |
Milewicz,J. et al. Preliminary observations on the Carboniferous of the North Sudetic Depression of Poland |
1965 |
| details |
Westphalian D |
|
Canada(Nova Scotia) |
Barss,M.S. Carboniferous and Permian spores of Canada. |
1967 |
| details |
Carboniferous |
|
Poland |
Jachowicz,A. Flora of the Carboniferous:Microflora |
1972 |
| details |
Late Carboniferous |
|
Poland |
GŠ³recka,T. Productive Carbon in Region of Lower Silesia. |
1974 |