| details |
Toarcian |
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 |
Hettangian |
Sinemurian |
USSR(Ukrainian SSR) |
Petrosyants,M.A. Lower Jurassic palynocomplexes of the Bodrak River Basin (Mount Crimea). (In: Palynological investigations of Proterozoic and Phanerozoic oil and gas bearing regions of the USSR) |
1980 |
| original |
Late Sinemurian |
Early Toarcian |
USSR(Caucasus) |
Petrosyants,M.A. On certain Monocolpate pollen grains in Lower-Middle Jurassic deposits of Southern SSSR. (In: Palinologicheskie issledovaniya Proterozoya i Fanerozoya neftegazonoshykh. T.V. Byvsheva, editor.) |
1980 |