The area depicted in this image is located in the Noctis Labyrinthus region of Mars.
Targeting the bright rimmed bedrock knobs, the image also captures the interaction of two distinct types of windblown sediments. Surrounding the bedrock knobs is a network of pale reddish ridges with a complex interlinked morphology. These pale ridges resemble the simpler “transverse aeolian ridges” (called TARs) that are common in the equatorial regions of Mars.
Dark sand dunes comprise the second type of windblown sediment visible in this image. The dark sand dune seen just below the centre of the cutout displays features that are common to active sand dunes observed by HiRISE elsewhere on Mars, including sets of small ripples crisscrossing the top of the dune.
The original image was acquired on 31 August 2013 by the HiRISE (High Resolution Imaging Science Experiment) instrument aboard Nasa’s Mars Reconnaissance Orbiter (MRO). HiRISE is operated by the University of Arizona, Tucson.
– Caption by Paul Geissler
– Image credit: Nasa/JPL/University of Arizona
– Source: Nasa