Can someone tell me the different types of erosion in the sahara desert?
There are three main types of erosion in the Sahara :- 1) Attrition or wind blasting whereby the wind picks up sand particles during sand storms and blasts them against rock surfaces. This results in sculptured features parallel with the prevailing wind direction. 2) Ex-foliation as a result of the expansion / contraction of rocks due to the exceptional temperature variations between dawn (when it is coldest) and just after mid-day (when it is hotest). On occasions where the temperatures decrease below freezing and there is the precipitation of dew (which freezes), this ex-foliation becomes an increasing contributor to erosion. 3) Fluvial power – on the rare occasions that it rains, rain is often very heavy. Because the surface is often baked hard, there can be large surface run off which leads to flash floods and, normally empty valleys being filled with turbulent waters that move almost everything in their path. As a result of these occasional flash floods, desert valleys though norm
