ClipArt ETC
Map of a desert area with yardangs, and cross sections of the same on a much larger scale. 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.

Yardangs

Map of a desert area with yardangs, and cross sections of the same on a much larger scale. Yardangs…