This image, which was originally used to track the movement of sand dunes near the north pole of Mars, shows us soil with parallel striations oriented from the upper left corner to the lower right corner.
These striations are due to neatly spaced piles of boulders.
In terrestrial Arctic zones, similar structures are produced where the soil repeatedly undergoes cycles of melting and refreezing……
(Detail extracted from image https://www.uahirise.org/ESP_053937_2550 )
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