Category:Yardangs - Wikimedia Commons
- ️Sun Feb 07 2016
From Wikimedia Commons, the free media repository
a sharp-crested ridge carved by wind erosion from soft but coherent deposits (as clayey sand)
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English: A yardang (other names are yadan, koukour, kalut) is a streamlined hill carved from bedrock or any consolidated or semiconsolidated material by the dual action of wind abrasion, dust and sand, and deflation. Yardangs become elongated features typically three or more times longer than wide, and when viewed from above, resemble the hull of a boat. Facing the wind is a steep, blunt face that gradually gets lower and narrower toward the lee end. Yardangs are formed by wind erosion, typically of an originally flat surface formed from areas of harder and softer material. The soft material is eroded and removed by the wind, and the harder material remains. The resulting pattern of yardangs is therefore a combination of the original rock distribution, and the of the air flow and resulting pattern of erosion.
Subcategories
This category has the following 6 subcategories, out of 6 total.