| original |
Visean |
|
USSR(Urals) |
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 |
| details |
Late Visean |
|
USSR(European) |
Umnova,N.I. Palynological characteristics of Visean deposits of the Central Region of the Russian Plate. (In: Palinologicheskie issledovaniya Proterozoya i Fanerozoya neftegazonoshykh. T.V. Byvsheva, editor.) |
1980 |
| details |
Early Carboniferous |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Middle Visean |
|
USSR(Russian Platform) |
Byvsheva,T.V. Palynological description and stratigraphy of the Tournaisian and Lower and Middle Visean deposits of the eastern Regions of the Russian Platform. |
1971 |