Ridge Sands

masses of sands forming narrow parallel ridges. Their direction depends on the prevailing winds. They are a few kilometers long; the heights of half-overgrown sand ridges range from 1 to 70 m, and of bare ridges, up to 200 m. The distance between ridges is from tens of m to 2–4 km. They form through the action of wind-current eddies, which arise as a result of the rotation of the earth; another factor in their formation is the unequal heating of slopes of various exposures. Ridge sands are widely distributed in Middle Asia, Australia, and Africa.

单词	ridge sands
释义	Ridge Sands Ridge Sands masses of sands forming narrow parallel ridges. Their direction depends on the prevailing winds. They are a few kilometers long; the heights of half-overgrown sand ridges range from 1 to 70 m, and of bare ridges, up to 200 m. The distance between ridges is from tens of m to 2–4 km. They form through the action of wind-current eddies, which arise as a result of the rotation of the earth; another factor in their formation is the unequal heating of slopes of various exposures. Ridge sands are widely distributed in Middle Asia, Australia, and Africa.
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