| details |
Early Frasnian |
|
USSR(Komi ASSR) |
Sennova,V.F. et al. Devonian stratigraphy of the Kanin Peninsula |
1986 |
| details |
Visean |
|
USSR(Ukrainian SSR) |
Ishchenko,A.M. Spores. (In: Fauna and flora of Coal deposits of Galicia-Volyn Depression) |
1956 |
| details |
Early Visean |
|
USSR(Urals) |
Sultanaev,A.A. Stratigraphy. (In: Paleontological Atlas, Carboniferous Deposits of the Urals.) |
1975 |
| details |
Nd |
|
Nd |
Byvsheva,T.V. Palynological character and stratigraphical arrangement of the Bobrikov horizon as found in the Lower Carboniferous Period of the Volga-Urals Region. |
1967 |