КОРРЕЛЯЦИЯ ВЕРХНЕМЕЛОВЫХ ЗОНАЛЬНЫХ СХЕМ ВОСТОЧНО-ЕВРОПЕЙСКОЙ ПЛАТФОРМЫ ПО ФОРАМИНИФЕРАМ, РАДИОЛЯРИЯМ И НАНОПЛАНКТОНУ

This article proposes a composite biostratigraphical scheme for the Upper Cretaceous of the East European Platform on the basis of the distribution in the sections of three groups of microfossils–foraminifers, both planktonic and benthic, radiolarians and nannoplankton. Most of the stages and subsustages boundaries are confirmed by macropalaeontological data. The most divided units are on benthic foraminifers and nannoplankton. The diversity of these microfossils and their constant presence in the sections made it possible to identify zones and subzones, while it is possible to subdivide only the beds by planktonic foraminifers and radiolarians. The most favorable stages in the development of plankton biota can be considered the Turonian-Coniacian interval, when the basins of the East European Platform felt the intensive influence of the warm waters of the Tethys ocean. The global Campanian coooling is clearly recorded, reflecting on the taxonomic diversity of all microfossil groups.