Tectonic units of the Western Carpathians are arranged in belt-like order, with the external units in the north and internal units in the south. Alpine evolution of the Western Carpathians is dominated by extension and closure of two or three oceanic domains: Triassic-Jurassic Meliata-Halstatt Ocean, Jurassic-Cretaceous Piemont-Vahic Ocean/Zone and Cretaceous-Tertiary Valais-Magura Ocean. After a subduction of the Meliata Ocean, the Internal Western Carpathians were formed. Suturing of Vahic domain finalized thrusting in the Central Western Carpathians, and consuming the crust of Carpathian Flysch Basins caused the formation of the External West Carpathian accretionary wedge (Flysch Belt).