Ventifact!

VENTIFACT

these are rocks that have been abraded, grooved, by wind-driven sand. these gemorphic features are most typically found in & environments where there is little vegetation to interfere with eolian particle transport where there are frequently strong winds, & where there is a steady but not overwhelming supply of sand. ventifacts can be abraded to eye-catching natural sculptures. in moderately tall, isolated rock out crops, mushrooms shaped pillars of rock may form as the out crop is eroded by saltating sand grains. this occurs because , even in strong winds, sand grains can't be continuously held in the air.