| details |
Aalenian |
Bajocian |
USSR(Kazakh SSR) |
Alimov,K.A. et al. Jurassic spore and pollen assemblages of Ustyurt. (In: Mikrofossilii Drevneishikh Otlozhenii. T.F.Vozzhennikova and T.B.Timofeev, editors) |
1973 |
| details |
Early Callovian |
Middle Callovian |
USSR(Kazakh SSR) |
Alimov,K.A. et al. Jurassic spore and pollen assemblages of Ustyurt. (In: Mikrofossilii Drevneishikh Otlozhenii. T.F.Vozzhennikova and T.B.Timofeev, editors) |
1973 |
| details |
Early Albian |
|
USSR(Kazakh SSR) |
Alekseeva,V.I. et al. On paleontological substantiation of the Border between Aptian and Albian deposits at the East of the North Fore-Caspian area |
1974 |