Century Dictionary and Cyclopedia
- n. A crescentic sand-dune occurring commonly in the deserts of Turkestan. Also barkhan, barkan. See medano.
- n. An arc-shaped sand ridge comprised of well-sorted sand.
- From Russian бархан, from Kazakh бархан. (Wiktionary)
“It's what's technically known as a barchan, and the entire dune walks across the desert in a westerly direction at a speed of about 17 meters per year.”
“Earlier models predicted that crescent-shaped sand dunes called barchan dunes should grow to at least 500 meters long - but many are only 100 meters.”
“In case there is any mistake, Dawkins gives the example of a permanent dune - a barchan - that the wind pushes across the desert but which maintains it shape even while individual grains of sand are being blown into and out of the dune.”
“Fine white grains of gypsum are blown by the winds to form a variety of dune types: dome-shaped, barchan, transverse, and parabolic.”
“Today's Astronomy Picture of the Day shows flowing barchan dunes on the surface of Mars.”
“Dune types range from solitary barchan dunes to extensive longitudinal dunes (300 km long) in the southwest and colossal dune mountains in the northeast.”
“Tsugeer els and Altan els reserves typify north-central Asian desert ecosystems, with remnant mountains, barchan lowlands and green oases.”
“Actually, even a barchan is more of a 'thing' than a wave.”
“In its place was a narrow, low dune that terminated in a higher barchan of mineral-rich sand.”
“You know, the important stuff, like Lady X, Monobrow, and the mating habits of barchan sand dunes.”
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