sentences:  Two largescale nappe units are overlying the basement and its sedimentary cover.The lower Fatric Unit composed of Lower Triassic to Cenomanian sediments of two types, the Zliechov succession, distinguished by deep marine Jurassic facies and the Belá succession with the shallow marine facies deposited in the same time.Uppermost nappe unit of the nappe structure is called the Hronic unit, with the Carboniferous-Permian extensive volcanosedimentary succession (Ipoltica Group) and Triassic, less often Jurassic-Lower Cretaceous limestones and dolomites (the Čierny Váh, Biely Váh and Bebrava successions).