The Maastrichtian–Danian Boundary Deposits of Central Crimea: New Data on Calcareous Nanoplankton
Journal: Moscow University Geology Bulletin
Year: 2019

This article discusses the structural peculiarities and new data on the distribution of calcareous nanoplankton from Cretaceous–Paleogene boundary deposits of the central area of Piedmont (Predgornyi) Crimea. Both Maastrichtian and Danian rocks contain abundant Cretaceous nanoplankton assemblages. Danian nanoplankton is scarce, characterized by a poor degree of preservation, or even absent. Upper Maastrichtian rocks contain the species Tranolithus orionatus (=Tranolithus phacelosus Stover), whic