| details |
Aptian |
|
USSR(Stalingrad) |
Asatkina,E.F. et al. A list of plant, spore and pollen of the Aptian deposits of some districts of the USSR. (In: Atlas of Lower Cretaceous spore-pollen complexes of some regions of USSR. I.M.Pokyovsksys and N.K.Stel'mak, editors) |
1964 |
| 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 |