| details |
Early Carboniferous |
|
USSR(Russian Plain) |
Byvsheva,T.V. Spore assemblages from the Upper Devonian and Lower Carboniferous of the eastern Russian Plain. |
1976 |
| details |
Nd |
|
Nd |
Avkhimovich,V.I. et al. Miospore systematics and stratigraphic correlation of Devonian-Carboniferous boundary deposits in the European part of the USSR and Western Europe |
1988 |
| details |
Early Tournaisian |
|
USSR(Urals) |
Ananiev,A.R. et al. Stratigraphy of the Coal-bearing Lower Carboniferous of the eastern Slope of the Urals. (In: Paleontological Characteristics of the Main Subdivisions of the Carboniferous.) |
1979 |