Lithological characteristics of the Baltian and sarmatian sands between Savranka and Kodyma as possible collectors of accumulation of heavy minerals - N. A. Fedoronchuk; I. A. Suchkov; V. A. Turbalak; I. O. Goncharova; L. F. Baranova (Collection of scientific works of the Institute of Geological Sciences NAS of Ukraine, 2018)