| details |
Early Carboniferous |
|
USSR(Udmurt ASSR) |
Bludorov,A.P. et al. The presence of Coal in the Lower Carboniferous of Southern Udmurtia. |
1961 |
| original |
Early Visean |
|
USSR(Belorussian SSR) |
Kedo,G.I. Spores of the Lower Carboniferous of the Pripyat Trough, (Yasmopolyanskii Substage). (In: Paleontology and Stratigraphy of the BSSR) |
1966 |
| details |
Visean |
|
USSR(Russian Platform) |
Byvsheva,T.V. Spores of the Tournaisian and Visean deposits around the Russian Platform. (In: Atlas of Spores and Pollen of Oil and Gas Bearing Deposits of the Russian and Turonskoi Platform. V.V.Menner and T.V.Byvsheva, editors) |
1985 |