Wind Erosion - o Occur in areas with resistant and less...

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Wind Erosion Involves the following processes: 1. Abrasion/Corrasion: The wearing away of the sides and the bed of a river by the impact of the load. 2. Deflation: When wind blows away rock waste leaving a depression in deserts. An example is the Qattara depression in Egypt. 3. Atrrition: The breaking down of the load by particles hitting against each other. Features Produced by Wind Erosion 1. Rock Pedestals: o A tower-like mass of rock made up of alternating layers of resistant and less resistant rock. o The less resistant layers are eroded away faster than the more resistant layers leaving a mass of rock with projections protruding from it. 2. Zeugens: o Occur in areas with resistant and less resistant rocks occurring in layers perpendicular to the prevailing wind. o The less resistant rock is more eroded than the less resistant rock producing a ridge and furrow landscape. 3. Yardangs:
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Unformatted text preview: o Occur in areas with resistant and less resistant rocks occurring in layers parallel to the prevailing wind. o The less resistant rock is more eroded than the less resistant rock producing a ridge and furrow landscape. o An example is near Komombo in Egypt and near InSalah in Egypt 4. Deflation Hollows: o These are depressions produced by the deflation in weak rocks. o When the water table is reached, a swamp/oasis may be formed in these depressions. o The largest is the Qattara depression in Egypt. o Flat floored depressions are called pans . Features Produced by Wind Deposition Dunes: deposits of sand by wind in deserts. 1. Barchans: Crescent shaped deposits made when sand being blown by wind encounters an obstruction such as a rock or a dead camel. 2. Seifs: Ridge-shaped deposits od sand with steep sides lying parallel to the prevailing winds....
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This note was uploaded on 11/10/2011 for the course GEA GEA2000 taught by Professor Wong,faith during the Fall '09 term at Broward College.

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