longitudinal dune

longitudinal dune
   A long, narrow sand dune, usually symmetrical in cross profile, oriented parallel to the prevailing wind direction; it is wider and steeper on the windward side but tapers to a point on the lee side. It commonly forms behind an obstacle in an area where sand is abundant and the wind is strong and constant. Such dunes can be a few meters high and up to 100 km long.
   Compare: seif dune, transverse dune.
   GG

Glossary of landform and geologic terms. 2013.

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