| details |
Berriasian |
Early Barremian |
USSR(Ukrainian SSR) |
Kuvayeva,S.B. et al. Palynological characteristic of the Lower Cretaceous deposits of the mountain part of Crimea. |
1973 |
| details |
Valanginian |
|
USSR(Ukrainian SSR) |
Vakhrameev,V.A. et al. Paleobotanical data and the Border Line between Jurassic and Cretaceous Systems. |
1973 |
| details |
Berriasian |
|
USSR(Azerbaijan SSR) |
Vakhrameev,V.A. et al. Paleobotanical data and the Border Line between Jurassic and Cretaceous Systems. |
1973 |
| details |
Late Albian |
|
USSR(Ukrainian SSR) |
Kuvayeva,S.B. On possible affinity of plants producing Corniculatisporites, Kuv., spores to Schizaeaceae. (As suggested by the study of spore morphology). |
1973 |
| details |
Valanginian |
|
USSR(Ukrainian SSR) |
Voronova,M.A. Palynological characteristic of the contiguous Upper Jurassic-Lower Cretaceous formations of the Dnepr-Donets Trough. |
1971 |
| details |
Valanginian |
Aptian |
USSR(Ukrainian SSR) |
Voronova,M.A. Stratigraphic subdivision of Lower Cretaceous sediments of the Dnieper-Donets Basin, based on palynology. |
1971 |