Aeolian Landform ( 02. Dune)

02.Dune                                                                                                                                                           Back to Aeolian Landforms

dunes at holland

  • A dune is a hill or a ridge made of sand. Dunes are shaped by the wind, and change all the time.
  • Sand dunes are mounds of windblown sand.
  • Less than 1m-10m high.
  • The size depends upon the supply of sand.
  • The impressive sand dunes along the eastern shore of Lake Michigan.
  • Michigan is home to the largest dune system in the world, associated with a freshwater lake.
  •  Required elements :
  • supply dry sand is most important factor which  transporting and sorting by the wind and water.
  • Strong winds or water action, cannot initiate dune formation, however, without a supply of sand.
  •  Running water and normal winds can do this. 
  • elemenats are:
                  1) a source of dry sand
                  2) a means to sort and transport the sand
                  3) a land area on which to deposit the sand.  

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