Abstract
The calcic nannoplankton of the Cretaceous deposits of the Bakhchsarai region of the South-Western Crimea was studied. In the Lower Cretaceous, it is extracted from the Rezan and Biasala Formations, in the Upper Cretaceous — from the Belogorsk, Prokhladnoye and Kudrino Formations. The age of the enclosing sediments by calcareous nannoplankton has been specified. In the Rezan Formation, the nannoplankton zone is not singled out; in the Biasala Formation, apparently, part of the NC5 zone is present. In the Belogorsk Formation, the UC3 zone, subzone b, is allocated (partially), in the Kudrino Formation — the UC20 zone, and the UC20b subzone. Upper and lower boundaries of the zones are not traced.
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