| details |
Middle Visean |
|
USSR(Tatar ASSR) |
Bludorov,A.P. et al. Coal Measures of the Lower Carboniferous of Tatary |
1956 |
| details |
Early Carboniferous |
|
USSR(Urals) |
Tuzova,L.S. Spore-pollen complexes of the terrigenous Devonian and the Lower Carboniferous of Tertary and their value in stratigraphy. (In: Symposium on Problems of the Petroleum Geology of the Ural-Volga Region, USSR) |
1956 |
| details |
Visean |
|
USSR(Tatar ASSR) |
Tuzova,L.S. Spore-pollen complexes of the terrigenous Devonian and the Lower Carboniferous of Tartary and their value in stratigraphy |
1958 |