The Springtime Avalanche
In this 2010 image brought to us by NASA’s Mars Reconnaissance Orbiter, a cloud of dust particles is seen puffing up against a steep cliff. Now if you think you are seeing the top view of some sort of factory, you are mistaken.
NASA theorizes that the accumulation is most probably the result of an avalanche. It could also have been caused by the fall of frost made of carbon dioxide. Apparently, this phenomenon is pretty common on the red planet and happens usually during its springtime, which is around April to early May in Earth time.