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Western Carpathians

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Western Carpathians

Western Carpathians
Mała Bystra in the Vysoké Tatry Mts.
Highest point
Peak Gerlachovský štít
Elevation 2,655 m (8,711 ft)
Coordinates
Geography
Carpathian Mountains, Western Carpathians in green
Countries
region Lesser Poland, Moravia and Weinviertel
Parent range Carpathian Mountains
Geology
Orogeny alpine orogeny
Type of rock granite, limestone, sandstone, andesite

The Western Carpathians are a mountain range and geomorphological province that forms the western part of the Carpathian Mountains.

The mountain belt stretches from the Low Beskids range of the Eastern Carpathians along the border of Poland with Slovakia toward the Moravian region of the Czech Republic and the Austrian Weinviertel. In the south the North Hungarian Mountains cover northern Hungary. The area of the Western Carpathians comprises about 70,000 km². The highest elevation is the Gerlachovský štít (2,655m).

Geographical definition

Most of the perimeter of the Western Carpathians is quite sharply defined by valleys. To the northwest and north they are separated from the Bohemian Massif by the Forecarpathian Lowland and the Lesser Poland Upland; to the west the Moravian Gate leads over to the Sudetes. To the south the mountain chain falls away towards the Pannonian Plain, a large plain situated between the Alps, the Dinaric Alps, and the main mass of the Eastern Carpathians.[1]

The boundary between the Western Carpathians and the Eastern Alps is formed by the Vienna Basin, the Hainburg Hills of the Little Carpathians at Devín Gate, and a gap carved by the Danube. To the east and northeast the mountains are bounded by the East Slovak and Sandomierz Basins, but it is less striking and passes through highland terrain that continues to the Eastern Carpathians.

Geology

Geological map of Western Carpathians

The Western Carpathians are part of the northern branch of alpine orogeny, which was formed by the closure of the Tethys Ocean.

The Western Carpathians are part of the Alpide belt. To the west they longitudinally join the Alps, but the exact boundary is hidden under the Neogene sedimentary fill of the Vienna Basin. To the east, their boundary with the Eastern Carpathians is the valley of the Hornád or Uzh River. The northern boundary with the East European craton and Bohemian Massif is well marked by the thrust of nappes of the Carpathian flysch belt. The southern boundary is less clear, because later postorogenetic evolution caused formation of basins, penetrating the mountain chain non-uniformly.

The Western Carpathians have a complicated geological structure, that has been formed since the Paleozoic era. The oldest Paleozoic rocks experienced the first stage of deformation during the Hercynian orogeny, but younger Alpine overprint is common. Alpine orogeny affected the area in several stages from Jurassic to Neogene. During this period, parts of Tethys Ocean were subducted under the African plate and Western Carpathian blocks were thrust over the margin of the Eurasian plate.

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:[2] 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).

References

  1. ^ Vladár, J. (Editor) 1982: Encyklopédia Slovenska. VI. zväzok T-Ž. Bratislava, Veda, p. 497
  2. ^ Plašienka, D., 2002: Origin and growth of the Western Carpathian orogenetic wedge during the mesozoic. Geologica Carpathica Special Issues, 53, Proceedings of XVII. Congress of Carpathian-Balkan Geological Association Bratislava, September 1st - 4th 2002
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