Sand Dunes
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Dark dunes (probably basalt), in an intracrater dune field, Noachis. Picture from Mars Global Surveyor, under the MOC Public Targeting Program.
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Wide view of dunes in Noachis, as seen by HiRISE.
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Close-up View of dunes in previous image, as seen by HiRISE. Note how sand barely covers some boulders.
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Barchan sand dunes in the Hellespontus region, as seen by HiRISE. The horns point in the downwind direction.
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Proctor Crater ripples and dunes, as seen by HiRISE.
Read more about this topic: Noachis Quadrangle
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