title: NANNOPLANKTON STRATIGRAPHY OF LOWER CRETACEOUS OF SOUTHERN UKRAINE
abstract: In the Lower Cretaceous of the south Ukraine calcareous nanoplankton represented in all lithological rock types, sometimes nannofossils are rock-forming components, but weak variability complicates stratigraphic taxonomic diversity of this group. On the basis of material from the mountain and flat Crimea and the north Black Sea region in the Lower Cretaceous we have identified nine zones: in Tytonian – lower Berriasian zone Nannoconus steinmannii minor; Upper Berriasian – Valanginian zone Reteca
journal: Geological Journal