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.