ИСТИНА

The first data on the distribution of planktonic radiolarians and foraminifers in the Mt. Biuk-Karasu section, the central Crimean Mountains, are considered. According to the analyzed distribution of radiolarians, the Upper Cretaceous deposits of the section are subdivided into three biostratigraphic units: Alievium superbum–Phaseliforma turovi (upper part of Middle Turonian), Dactyliodiscus longispinus–Patulibracchium (?) quadroastrum (Upper Turonian) and Orbiculiforma quadrata–Patellula sp. B (Turonian–Coniacian boundary strata). Alievium superbum–Phaseliforma turovi beds were formerly characterized by assemblage with Alievium superbum–Phaseliforma sp. A (Middle Turonian of Mt. Chuku (south-western part of Crimean Mountains) and of Mt. Ak sections (central part of Crimean Mountains). Subdivisions substantiated by distribution of planktonic foraminifers are the Whiteinella paradubia (?Lower Turonian-lower part of Middle Turonian), Marginotruncana pseudolinneiana (upper part of Middle Turonian) and Marginotruncana coronata (Upper Turonian). The Marginotruncana pseudolinneiana beds and Marginotruncana coronata beds are correlative with the zones of the same names in the Crimea–Caucasus region foraminiferal zonation. Key-words: Crimea, stratigraphy, Turonian, Coniacian, Radiolaria, Foraminifera. This work was supported by RFBR grants 13-05-00447 and 12-05-00263.