File:Russell Crater Dunes, Defrosted.jpg

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Description
English: The Russell Crater dune field is covered seasonally by carbon dioxide frost, and this image shows the dune field after the frost has sublimated (evaporated directly from solid to gas). There are just a few patches left of the bright seasonal frost. Numerous dark dust devil tracks can be seen meandering across the dunes. The face of the largest dune is lined with gullies. The source of the gullies is unclear but could involve erosion by the seasonal carbon dioxide ice.
Date
Source HiRISE
Author NASA/JPL/University of Arizona

Local Mars time: 3:20 PM. Latitude (centered): -54.3 °. Longitude (East): 12.9 °. Range to target site: 253.0 km. Original image scale range: 25.3 cm/pixel (with 1 x 1 binning) so objects ~76 cm across are resolved. Map projected scale: 25 cm/pixel and north is up. Map projection: EQUIRECTANGULAR. Emission angle: 6.1 °. Phase angle: 53.4 °. Solar incidence angle: 48 °, with the Sun about 42 ° above the horizon. Solar longitude: 252.7 °, Northern Autumn. For non-map projected products: North azimuth: 96 °. Sub-solar azimuth: 23.7 °.

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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current16:58, 10 November 2010Thumbnail for version as of 16:58, 10 November 20102,560 × 1,920 (7.5 MB)Originalwana (talk | contribs){{Information |Description={{en|1=The Russell Crater dune field is covered seasonally by carbon dioxide frost, and this image shows the dune field after the frost has sublimated (evaporated directly from solid to gas). There are just a few pat

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