| details |
Late Jurassic |
|
USSR(Kazakh SSR) |
Murakhovskaya,E.I. et al. Upper Cretaceous deposits in Semipalatinskaya Pre-Irtyshskoye and the Pecularities of their pollen and spore contents. |
1976 |
| details |
Late Jurassic |
Early Cretaceous |
USSR(Ukrainian SSR) |
Lomayeva,E.T. Spores and pollen of Pre Upper Cretaceous sediments occurring in the Zhitomir area |
1961 |
| details |
Valanginian |
Aptian |
USSR(Ukrainian SSR) |
Voronova,M.A. Stratigraphic subdivision of Lower Cretaceous sediments of the Dnieper-Donets Basin, based on palynology. |
1971 |