barchan


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barchan

[bär′kän]
(geology)
A crescent-shaped dune or drift of windblown sand or snow, the arms of which point downwind; formed by winds of almost constant direction and of moderate speeds. Also known as barchane; barkhan; crescentic dune.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
A geometry quantitative model describing barchan dune shape proposed by Sauermann et al.
"It's unclear why barchan dunes exist at all," says Pieter Vermeesch, a geologist at University College London.
Already in the 90s of the last century (after organization of the clinic of the Termez branch of the Research Institute of Therapy and Medical Rehabilitation) the psammotherapy studies on the steppe barchan sand origin "Etim-Kum" were begun, where a proper ground for sand baths was established (Zunnunov et al., 2006).
The largest sand structures (rhourds, linear dunes or seifs, elbs, and silks) are stable, while barchan dunes may move dozens of meters a year (even hundreds of meters in the sand tongues of Patagonia).
Margareta Barchan is the president and CEO of Celemi (www.celemi.com), a company that creates learning processes enabling groups of people to quickly understand the changing needs of their business and react accordingly.
The tranquil turquoise waters of the Gulf are surrounded by white and golden crescent-shaped Barchan dunes which reflect all the golds and pinks of the sunrises and sunsets, casting dramatic shadows across the desert.
Alan Barchan, Two Centuries of Education in New South Wales, (NSW: NSW UP, 1988) 152-3; Millie Eichholzer (ed.) Our Girls 1884-1984.
When this happens, the dune's leading edges curve around to form a crescent or barchan dune.
Outside the park Lilifesters can enjoy the family day at Habbies and the return of Barchan Mad Comedy to Kilbarchan Performing Arts Centre in the evening."
Arise's nomination committee members are Johan Claesson, of CA Fastigheter et al; Bengt HellstrA m, of Tredje AP-fonden; Jan Barchan, of Briban Invest, Peter Gyllenhammar, appointed by the company and himself and Gahm, the chairman of the board
The dunes seen in the image are primarily (https://www.britannica.com/science/barchan) "barchan" dunes, which are crescent-shaped structures produced by action of wind from one direction.