Craters are most often the site of gully formation on Mars. Mega-gullies are also found on the southwestern parts of Vallis Marineris, and in this image from NASA 2001 Mars Odyssey spacecraft, on hills east of Argyre Planitia.
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Details
Title: Gullies
Creator: NASA/JPL/ASU
Date Created: 2011-07-11
Rights: JPL
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