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White Rock from Mars Reconnaissance Orbiter: HiRISE color detail

White Rock from Mars Reconnaissance Orbiter: HiRISE color detail
White Rock from Mars Reconnaissance Orbiter: HiRISE color detail This is a segment of a HiRISE image of White Rock, Pollack crater, Mars, shown (in the enlarged version) at 50 centimeters per pixel, half its full resolution. The blue areas are olivine-rich basaltic sand. The yellow areas are the outcrops that form White Rock. Everywhere, the blue sand forms dunes, even across the steep landforms of the White Rock deposits. It is difficult to determine whether the White Rock deposits are layered because of the confusing patterns formed by the sand dunes. You can see more of this image at the HiRISE website. NASA / JPL-Caltech / University of Arizona