What is a yardang and how are they produced?
A yardang is a fluted aerodynamic feature formed by eolian erosion. It is a wind-abraded elongated ridge-like sharp-crested landform with a steep and broader wind-faced front and a lower and narrower end. Typical yardangs resemble an inverted boat hull. The downwind end is the “stern,” which may have a sand tail. The upwind end is the “bow.” Yardangs are formed by the wind erosion of adjacent material that is less resistant.