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details | Aptian | USSR(European) | Voronova,M.A. Subdivision of Lower Cretaceous deposits in the northwestern part of the Dnieper-Donetsk Depression on the ground of resuts of sporopollen analysis. (In: The Importance of Palynological Analysis for the Stratigraphic and Paleofloristic Investigations. M.I. Nejshtadt, editor. Papers for the Second International Palynology Conference., Utrecht,1966) | 1966 | |
details | Hauterivian | Aptian | USSR(Ukrainian SSR) | Voronova,M.A. Stratigraphic subdivision of Lower Cretaceous sediments of the Dnieper-Donets Basin, based on palynology. | 1971 |