| original |
Aalenian |
Bajocian |
USSR(Ukrainian SSR) |
Semenova,E.V. Spore and pollen assemblages of deposits of the Jurassic and Triassic Boundary of the Don Basin. |
1970 |
| details |
Volgian |
|
USSR(Permsk Oblast) |
Kruchinina,N.V. et al. Morphology of spores of some representatives of the Infra-Turma Laevigati. (In: Paleomikrofitologicheskie issledovaniya dlya tselei stratigrafii. L.A. Panova, editor.) |
1980 |
| details |
Early Jurassic |
|
USSR(Krasnodar Kray) |
Rimsha,L.A. et al. To the problem of stratigraphic position of Pre-Cretaceous series in Western Cis-Caucasian Territory. |
1975 |