Abstract
Information on the structure features as well as new data on the distribution of calcareous nanoplankton (NP) from the Cretaceous-Paleogene boundary deposits of the Central Crimea is given. There is a rich complex of Cretaceous NP in both Maastrichtian and Danian rocks. Danian NP is sparse, poor preserved or absent. Lower Maastrichtian species Tranolithus orionatus (=Tranolithus phacelosus Stover) unknown in the Upper Maastricht of European sections and described only from the Upper Maastricht of the South-West of Tunisia is noted in Upper Maastrichtian rocks of studied area. Zones NP2–NP4 were determined in Danian rocks. The question of paleogeography is also concerned.
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