| details |
Famennian |
|
USSR(Belorussian SSR) |
Kedo,G.I. Spores of the Devonian deposits which lie over the Saliferous Layers of the Pripet (Pripyat) Depression, and their stratgraphic significance. |
1957 |
| details |
Frasnian |
Famennian |
USSR(Kemerovskaya) |
Andreeva,E.M. et al. New data on the phytostratigraphy of Devonian Deposits in the Altay-Sayan Mountain Region. (In: Contributions to the Phytostratigraphy of Devonian Deposits in the Altay-Sayon Mountain Region, Collected Articles) |
1962 |
| details |
Early Carboniferous |
|
USSR(Urals) |
Medvedeva,A.M. Palynological investigation of Petroleum |
1978 |