Aeolian Landforms (01.Barchan )

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  • A barchan (barkhan dune)  is an arc-shaped ( crescent-shaped) sand ridge.
  • Comprising well sorted sand.
  • produced by the action of wind predominately from one direction. 
  • These dunes are markedly asymmetrical in cross section.
  • Gentle slope facing toward the wind and a much steeper slope, known as the slip face, facing away from the wind. 
  • these dunes migrates 100m per year.
  • Barchans may be 9–30 m  high and 370 m wide at the base perpendicular to the wind.
  • They gradually migrate with the wind as a result of erosion on the windward side and deposition on the leeward side.
  • barchan dunes  usually occur as isolated dunes.
  • these kind of inland regions originated by the The Russian naturalist Alexander von Middendorf  in Turkistan 1881.


  • The largest barchan  being at Parangkusumo Beach
  • La Joya , Arequipa, Peru (16.714564°S 71.834083°W); a number of dunes are readily visible from the Pan American Highway at the intersection with the Carretera Interoceanica just north of La Joya
  • south of the special region of Yogyakarta, Indonesia

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