| details |
Callovian |
Volgian |
USSR(WSL) |
Rovnina,L.V. Spore-pollen assemblages of Upper Jurassic oil and gas bearing deposits of the western half of the West Siberian Lowland. (In: Sporen and Pollen in Oils and Deposits of Oil and Gas-Bearing Regions of the USSR.) |
1971 |
| details |
Late Jurassic |
|
USSR(WSL) |
Bezrukova,T.S. et al. Correlation of dissimilar deposits of the Late Jurassic and Neocomian of the West Siberian Basin by palinological data. (In: Ecostratigraphy and Ecological Systems of the Geological Past.) |
1980 |
| details |
Early Jurassic |
Middle Jurassic |
Russia(Siberia) |
Rovnina,L.V. et al. Floristic evolution and paleogeographic situation in the Early Middle Jurassic of West Siberia |
1997 |