A yardang 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 th...
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http://en.wikipedia.org/wiki/Yardang
ridge formed by wind erosion parallel to prevailing winds
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http://phrontistery.info/y.html
large area of soft, poorly consolidated rock and bedrock surfaces that have been extensively grooved, fluted, and pitted by wind erosion. The rock ...
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http://www.britannica.com/eb/a-z/y/4
An elongate ridge carved by wind erosion.
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http://www.evcforum.net/WebPages/Glossary_Geology.html
A steep-sided rock rib, etched by the wind in arid areas
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http://www.quick-facts.co.uk/earth/glossary.html
Ridge formed by wind erosion from a dried-up riverbed or similar feature, as in Chad, China, Peru, and North America. On the planet Mars yardangs occur on a massive scale
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https://www.encyclo.co.uk/local/21221
Sharp, irregularly-crested ridges carved by wind and oriented parallel to wind.
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https://www.encyclo.co.uk/local/22327
a keel-shaped crest or ridge of rock, formed by the action of the wind, usually parallel to the prevailing wind direction.
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https://www.infoplease.com/dictionary/yardang
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