ocr: SAND DUNES Dunes develop when the wind picks up sand, deposits SLIP FACE iti in heaps, and shapes it The steep side GENTLE SLOPE ofadune The side ofthe dune that faces the prevailing wind usually has a gentle slope SAND Sand consists of tiny particles ofrock or mineral SHAPING THE EARTH ALPINE RIFT VOLCANIC MOUNTAINS VALLEY HILLS CANYON DESERT VALLEY COASTLINE SLAND LANDSCAPE HISTORY
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