Diagenetic kaolinite and carbonate mineralization was for the first time determined in fhe deposits of Kallus beds of Nagoryans'ka Formation of Mogyliv-Podil'sk. Group on fhe base of X-ray analysis, thermoanalysis, chemical analysis and investigations by electron and light microscope. Structure, conditions of forming and mineral composition of Kallus beds are examined. Presence of high-alumina rocks says about fhe specific conditions of environment, transformation and wearing of deposits on fhe boundary of Mogyliv-Podil'ska and Kanylivska Groups on the South-Western slope of the East-European platform.
Key words: Vendian, high-alumina rocks, siallite, diagenesis, the South-Western slope of the East-European platform.