original |
Carboniferous |
|
Poland |
Zerndt,J. The Suitableness of megaspores as guide fossils. |
1938 |
original |
Westphalian |
|
W.Germany |
Zerndt,J. The Suitableness of megaspores as guide fossils. |
1938 |
original |
Early Permian |
|
India(Orissa) |
Srivastava,S.C. A palyno-Petrological study of some Barakar Coals of India |
1967 |
original |
Mississippian |
|
North Dakota |
Luther,M.R. et al. Environmental significance of a megaspore flora from the Mission Canyon Formation (Mississippian) Abottineau County North Dakota. (In: Fifth International Williston Basin Symposium) |
1987 |