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Wind Features, Large and Small | by UAHiRISE (NASA)
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Wind Features, Large and Small

This image shows a diverse array of such features: large dunes, small ripples, and dust-devil tracks (the dark, arcing structures on the dunes). This image is particularly interesting because of the occurrence of seasonal frost on the south-facing slopes. (The image is in the Southern Hemisphere, so south faces the pole and gets little winter light). This is particularly apparent in the color swath, as the frost forms pale, purplish patterns. On the dunes, this highlights some of the regular patterns, as the frost forms only on parts of the ripples. The result is an intricately textured pattern of color.


Image is less than 5 km (4 mi) across and is 255 km (158 mi) above the surface. For full images including scale bars, visit the source link.


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Uploaded on May 4, 2021