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The great variety of desert landscapes
Water action in desert landscapes
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activity aeolian aggradation agricultural Alluvial fans ANDREW GOUDIE arid areas Australia Bahrain barchanoid barchans basins bedrock calcretes cause cent climatic change crescentic dams Death Valley deflation deposition depressions desert areas desert crusts desert environments desert geomorphology desert landforms desert landscapes desert rainfall desert varnish desertification drainage density drought dust storms evaporation example Figure geomorphic geomorphological processes geomorphology glaciation grains ground surface ground-water gully gypsum human humid increased insolation weathering irrigation lake Lake Chad land surface landforms linear dunes major minerals moisture mountain front Namib occur Pleistocene pluvial populations production rates relatively relief result ridges river rock rock fracture runoff Sahara Sahel drought saline saltating sand dunes second edition sediment sediment yield semi-arid regions silcrete slopes sodium chloride sodium chloride crusts soil star dunes subsidence surface materials tectonic tend topographic variability vegetation cover water action water table wind erosion world's deserts zone