ventifact

A ventifact (also wind-faceted stone, windkanter) is a rock that has been abraded, pitted, etched, grooved, or polished by wind-driven sand or ice crystals. The word "Ventifact" is derived from the Latin word "Ventus" meaning 'wind'. These geomorphic features are most typically found in arid environments where there is little vegetation to interfere with aeolian particle transport, where there are frequently strong winds, and where there is a steady but not overwhelming supply of sand.

Ventifacts are formed by a variety of factors, including the type of original rock, wind speed and direction, size of aeolian particles, landscape variations, and the duration of this process, which is typically many years. They can be found in arid, coastal, and periglacial regions. Studying ventifacts can lead to historical observations regarding landscape formation. Scientists use ventifacts to describe both erosion processes and dominant wind patterns, which are used for both historical and future purposes. Many ventifacts on Earth are also influenced by the effects of water, which leads to studies on the planet Mars, where water is almost nonexistent.