| details |
Hauterivian |
Barremian |
USSR(WSL) |
Mchedlishvili,N.D. Lower Cretaceous flora of the northwestern part of the Western Siberian Lowland. (In: Palynology in Petroleum Geology. N.M.Ivanova, editor) |
1971 |
| details |
Middle Triassic |
|
USSR(Komi ASSR) |
Lozovskiy,V.R. et al. More information on the age of the upper part of Triassic variegated deposits in the Luza, Vychegda and Mezen River Bsins. |
1968 |
| original |
Keuper |
|
USSR(WSL) |
Malyavkina,V.S. Spores and pollen from Triassic deposits of the West Siberian Lowland. |
1964 |