Complex variations in dune forms within Hebes Chasma. This southern subframe image, frame 3506, is a 2.3 x 3.6 km area centered near 0.8 degrees south, 76.3 degrees west, taken by NASA's Mars Global Surveyor Orbiter.

Complex variations in dune forms within Hebes Chasma. This southern subframe image, frame 3506, is a 2.3 x 3.6 km area centered near 0.8 degrees south, 76.3 degrees west

Figure caption from Science Magazine.

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