ABSTRACT Adam Straka: Geochemistry of flysch succession sediments from selected localities of Magura Unit and Pieniny Klippen Belt. Comenius University in Bratislava, Faculty of Natural Sciences, Department of Mineralogy and Petrology Diploma work, 144 pages, 2011 Diploma work is focused on geochemistry and petrography of flysch sediments from two selected localities of Pieniny Klippen Belt. Work goals are principally based on classification of psammitic rock samples and characterization of source rock area. Petrographic analysis methodology, whole-rock chemical analysis and mineralogical analysis are chosen to achieve these goals. First locality – Nosice profile, is part of klippen belt area near Púchov. Studied sedimentary rocks are classificated as sandstones (lithic arenites, arcose arenites and sublitharenites) and claystones/ siltstones. Nature of supposed source rock area is close to recycled orogen – continental island arc in combination with magmatic arc. Protolithic rocks correspond to acidic differentiated source – metapelities, metapsammites, eventually granitoids. Second locality – Údol profile, is part of Pieniny Klippen Belt in tectonic position with Magura Unit and central-carpathian paleogene sediments. Analyzed sandstones of „black flysch“ are characterized as wackes, lithic arenites or subarcoses. Character of source rock area correspond to recycled orogen or a combination of passive, either active continental arc with dominant lithology of metapelites, acid magmatic rocks or with contribution of carbonates and metamaphic rocks. Key words: petrography, geochemistry, heavy minerals, flysch sediments, Pieniny Klippen Belt, Magura Unit, Western Carpathians