ИСТИНА

environments. The invasion of cold water from Arctic Region through the Russian Plate (Baraboshkin et al., 2003; Naidin et al., 2007; Blakey, 2012; Pugh et al., 2014) to South is confirmed by finding of Genus Prunobrachium in North Caucasus and Crimea Location. Latest Cretaceous family Prunobrachidae Pessagno occurs mostly in temperate and high paleolatitudes. Mass abundance of Prunobrachidae is indicative of cold water environments, which were characterized for Polar Urals, Russian Plate, Siberia, Russian Far East, South PaleoPacific (Tasman Sea) and New Zealand. Analysis of Prunobrachidae paleogeography during Late Santonian-Campanian shows bipolar distribution in temperate and high paleolatitudes. The distribution areas are almost symmetrical relative to the equator: 35º-62º N in the Northern Hemisphere and 50º-52º S in the South. It is very important to use representatives of family Prunobrachidae in the study of paleogeography and ecostratigraphy, as well as stratigraphic correlation of Tethyan and Boreal sequences of the Upper Cretaceous. The finding of calcareous dinocyst Pithonella globosa Futterer widespread in an interval Middle Maastrichtian–early Danian together with Orbiculiforma australis Pessagno, O. renillaeformis ampbell et Clark, Tholodiscus densus (Kozlova), allows to indicate rather warm episode during accumulation of the Late Maastrichtian siliceous clays. This research was supported by the Russian Foundation for Basic Research: 13-05-00447, 15-05- 04700, 15-05-04099 and IGCP-609 Project.