This NASA Mars Reconnaissance Orbiter shows many channels on a scarp in the Hellas impact basin. On Earth we would call these gullies. Some larger channels on Mars that are sometimes called gullies are big enough to be called ravines on Earth.
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Details
Title: True Gullies on Mars
Creator: NASA/JPL-Caltech/University of Arizona
Date Created: 2011-03-09
Rights: JPL
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