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:
2) a means to sort and transport the sand
3) a land area on which to deposit the sand.