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barchan
barchan (adj. barchanoid) Crescent-shaped mobile dune in a sand desert in which the wind blows predominantly from one direction. The dune moves by the erosion of sand from the windward slope, and its accumulation on the steeper lee or slip slope which stands at about 32°. Average velocities of dune movement are 10–20 m/yr.
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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "barchan." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "barchan." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-barchan.html AILSA ALLABY and MICHAEL ALLABY. "barchan." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-barchan.html |
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barchan
barchan(adj.barchanoid) A crescent-shaped mobile dune in a sand desert in which the wind blows predominantly from one direction. The dune moves by the erosion of sand from the windward slope and its accumulation on the steeper lee or slip slope, which stands at about 32°. Average velocities of dune movement are 10–20 m/yr.
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Cite this article
MICHAEL ALLABY. "barchan." A Dictionary of Ecology. 2004. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "barchan." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O14-barchan.html MICHAEL ALLABY. "barchan." A Dictionary of Ecology. 2004. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-barchan.html |
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