L11_Aeolian_web

L11_Aeolian_web - 3/13/09 Aeolian Processes Wind Action...

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3/13/09 1 Aeolian Processes Wind Action Sand Dunes Loess 2 Aeolian? Work of wind erosion, transportation and deposition = aeolian 3 Wind Action Air Flow - air is a fluid behaves similar to flowing water transportation & deposition of sediments by wind is an important process in shaping landforms wind action normally removes mineral particles only when they are in a dry state and unprotected by vegetation cover 2 kinds of erosional work by wind: abrasion & deflation 4 Deflation Desert pavement Blowout depressions
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3/13/09 2 5 Abrasion Affected by hardness of surface rocks, wind velocity and wind constancy Restricted to the area immediately above the ground (1-2m in height) Abraded rock appearance: pitted, grooved or polished aerodynamically shaped 6 How Does Wind Move Sand? 7 Saltation 8 Aeolian Deposition Wind-deposited sand bodies occur as sand sheets, ripples, and dunes
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3/13/09 3 9 Dunes 10 Sand Dunes any hill of loose sand shaped by wind
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This note was uploaded on 04/02/2011 for the course GEOG 102 taught by Professor Dr.merrinmacrae during the Winter '10 term at Waterloo.

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L11_Aeolian_web - 3/13/09 Aeolian Processes Wind Action...

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