A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #0-9

Kopaevich L., Vishnevskaya V. (2016) CenomanianCampanian (Late Cretaceous) planktonic assemblages of the CrimeaCaucasus area: Palaeoceanography, palaeoclimate and sea level changes // Palaeogeography, Palaeoclimatology, Palaeoecology. 441. Pp. 493515.

During the Cretaceous, the Crimea-Caucasus area occupied a position in the Peri-Tethys which was transitional between the Boreal and Tethyan realms. The evolution and stratigraphic distribution of planktonic foraminifera and radiolarians in the Upper Cretaceous sediments of the region is described. The specialized, morphologically complex keeled taxa evolved in the latest Albian and persisted until the end of the Cretaceous. These overall evolutionary trends are punctuated by a series of bioevents, one of the most important being the CenomanianTuronian Boundary. This is marked by a series of organic-rich sediments, that are related to an Oceanic Anoxic Event. The TuronianConiacian interval was marked by a further development of keeled taxa. A major change in the assemblage is described near the SantonianCampanian boundary, when marginotruncanids were replaced by globotruncanids.