The uniqueness of the landscape photographed is that it does not change, as happens with the dunes carried by the winds.
The image above shows a Martian sandstone located in West Candor Chazma, in Valles Marineris. The beautiful landscape is worth exploring due to its anomaly - these are dunes, but motionless. While other sand dunes of Mars, blown by the winds, slowly move across the planet's surface, the photographed terrain remains unchanged. That is, it is sandstone that could have formed only in the necessarily humid environment of the planet, and now scientists have to figure out what holds the grains of sand together and how this sandstone appeared.
NASA's Mars Reconnaissance Orbiter has been orbiting the planet for nearly 14 years. It is equipped with various instruments, including a compact spectrometer, which has already taken thousands of images of the surface of the Red Planet. The instrument is capable of detecting iron, oxides, phyllosilicates (clays) and carbonates. All these materials indicate that Mars was once a wet planet, and maybe there is still water in an unfrozen form on it.
Typically, spectrometer images are combined with photographs from the HiRISE camera, the largest reflex telescope ever sent into deep space. With its help, you can view the surface of Mars in the smallest detail, and pictures taken by his camera are posted on a special site.
All photographs are in color and have a high resolution. Images from a spectrometer, which are combined with photographs, can tell about the chemical properties of the considered areas of the planet's surface. But the resolution of the device is limited to about 18 meters of surface per pixel. The telescope camera has a resolution of 0.3 meters per pixel.