The paper presents the results of the micropaleontological study of the upper part of Sultanovka formation and Zelenogorsk formation (Berriasian) near Alekseevka village (Belogorsk area, Central Crimea). The representative assemblages of foraminifers and ostracods, as well as calpionellids and palynomorphs, are found in the Sultanovka formation. The beds with benthic foraminifers Conorboides hofkeri (upper part of the Berrassian) and Lingulina trilobitomorpha, Haplophragmoidesvocontianus (upper part of the Berrassian - Valanginian) were determined; the beds with Conoglobigerina gulekhensis, Lilliputinella eocretacea on planktonic foraminifera (Berrassian - Valanginian) and depleted assemblage with benthic Recurvoides and Trocholinidae, presumably of Berrassian-Valanginian age were defined. On the ostracods, two assemblages of Robsoniella longa, Sigillium sp.1 and Costacythere drushchitzi, Macrodentina sp.1 are found, the types of assemblages are well known mainly from Berrassian deposits ofCrimea, Caucasus, F