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wind gap
A wind gap is a valley through which a waterway once flowed but is now dry as a result of stream capture.〔(Digital Atlas of Idaho - Glossary of Natural History Terms )〕 A water gap is a similar feature, but one in which a waterway still flows. Water gaps and wind gaps often provide practical routes for trails, roads, and railroads through mountainous terrain.
Examples of wind gaps in the Blue Ridge Mountains of Virginia include Swift Run Gap, Rockfish Gap, and Buford's Gap. The last was the original crossing of the Blue Ridge Mountains near Bedford for the Virginia and Tennessee Railroad, later the Norfolk and Western Railway, a precursor of today's Norfolk Southern Railway system.
==References==
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抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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