Calcareous Nannoplankton of Cretaceous Rocks of the Bakhchisarai Region of Southwest Crimea

Resumo

Cretaceous calcareous nannoplankton was studied in the Lower Cretaceous Rezanaya and Biasala and Upper Cretaceous Belogorsk, Prokhladnoe, and Kudrino formations of the Bakhchisarai region of the southwest Crimea. The age of the host rocks was refined according to calcareous nannoplankton. No nannoplankton zone was identified in the Rezanaya Formation; the Biasala Formation probably contains part of the NC5 Zone. The Belogorsk and Kudrino formations host the (partly) UC3 Zone (Subzone b) and the UC20 Zone (Subzone UC20b), respectively. No upper and lower boundaries of zones were traced.