EOLIAN PROCESSES AND LANDFORMS

EOLIAN PROCESSES AND LANDFORMS - EOLIAN PROCESSES AND...

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EOLIAN PROCESSES AND LANDFORMS Depositional landforms 1. ripples o small sand waves with a wavelength of about 1 m, i.e. the typical path length of saltating grains o they are ephemeral and mobile, i.e. move, disappear and reform during wind storms o common the windward slopes of sand dunes 2. dunes o classic eolian landform o stable or advancing landform of windblown sand o originates as a mound of free sand from a sandy surficial deposit (e.g. beach, weathering sandstone) or from a blowout o as the mound grows it develops the dune asymmetry characterized by a gentle windward slope and a leeward slip face at the angle of repose for sand o same longitudinal shape as a ripple but several orders of magnitude difference in size, and thus dunes are much less mobile and more persistent o dunes migrate downwind as sand saltates up the windward face ( i.e. ripples migrate), accumulates where the wind dies just over the crest, and then flows (mass wasting ) over the slip face
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EOLIAN PROCESSES AND LANDFORMS - EOLIAN PROCESSES AND...

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