Good lighting may make it possible to catch an eruption of material that will darken the surrounding area before fading over time and moved about by the wind. This scene is at the Martian South Pole.
Dark
Light
This is a place where fans emerge relatively late in the Martian spring from polygonal cracks owing to the process of sublimation.
Image: NASA/JPL/University of Arizona https://www.uahirise.org/hipod/ESP_065786_0925
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