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Summary

Sand is one of the ultimate stages in the disintegration of rocks.

In deserts, the principal agent of erosion and the transport of materials is the wind (wind erosion). If the wind can act so effectively in eroding and  in the transporting of particles, it is because there is neither humidity nor vegetation nor relief to hold  and stabiilze those particles. The wind that sweeps the surface of the ground thus easily carries them away.

A sand dune can, via erosion, itself move from its windward side and accumulate on the opposite side. The landscape is thus constantly renewed.

Click on “Photo” to show an example of dunes.

Learning goals

  • To study the principal factors responsible for the erosion of a landscape.
  • To apply our knowledge to the explanation of some of the characteristics of the relief of the region.
  • To present several photos of several places around the globe illustrating  the same phenomena of alteration, erosion or accumulation.

 

Keywords

Learn more

Wind erosion explains the two types of desert landscapes: the rock deserts (reg) and the deserts of dunes (erg).

  • The regs are windswept places  lacking small particles.  The sand has been…

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