you might be marveled at the image, reminiscent of science fiction of Johannes Kepler' work Somnium, presenting a detailed imaginative description of how the earth might look when viewed from the moon, besides it is real. This image is the depiction of a layer of carbon dioxide ice covers the dunes and a warm spring sun melts the ice so that it evaporates. Sand becomes dislodged and forms the darker regions around the dunes. The process occurs often enough that there are often small clouds of dust that form around the dunes as well.
Look closely, this astonishing image, taken in the north latitudes of Mars, and you can see cracks of ice, these cracks slowly disappear as the ice melts and evaporates. The images were taken with the HiRISE camera on the Mars Reconnaissance Orbiter, transmitted over the Deep Space network.
Your fascination ends here, the planet Mars gets more astounding by the minute. New images discloses a varied surface, with bright layered deposits – here, shown near a plateau in the Juventae Chasma. Brown, purple, sandy regions appear across the entire 3/4 mile region, illuminated from the left of the image.
The deposits are consistent with low-temperature regions. Along the walls, researchers have found that bright deposits are consistent with a persistent rainfall and run-off, but have not determined when this could have occurred or from what source. "The stripes are layers of sediments that were probably laid down by water a long time ago, More recently, they were worn out by windblown sand (the dark dunes seen in this image) to show the layers.