definitions
  • synonyms

barchan dune

[ bär-kän ]

A large, crescent-shaped dune lying at right angles to the prevailing wind and having a steep, concave leeward side with the crescent tips pointing downwind. Barchan dunes form on flat, hard surfaces where the sand supply is limited. They can reach heights of up to 30 m (98 ft) and widths of 350 m (1,148 ft). See illustration at dune.

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Nearby words

barce, barcelona, barcelona chair, barch, barchan, barchan dune, barchester towers, barclay, barclay de tolly, barcode, barcoo river
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.