File:PIA11706 - How Gas Carves Channels.jpg

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DescriptionPIA11706 - How Gas Carves Channels.jpg	English: A layer of dry ice covers the South Polar layered deposits every winter. In the spring, gas created from heating of the dry ice escapes through ruptures in the overlying seasonal ice, entraining material from the ground below. The gas erodes channels in the surface, shown in this image, generally exploiting weaker material. The ground likely started as polygonal patterned ground (common in water-ice-rich surfaces), and then escaping gas widened the channels. Fans of dark material are bits of the surface carried onto the top of the seasonal ice layer and deposited in a direction determined by local winds. The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colo. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.
Date	24 July 2016 (published 24 January 2017)
Source	Catalog page · Full-res (JPEG · TIFF)
Author	NASA/JPL-Caltech/Univ. of Arizona

Location on Mars	82° 21′ 14.4″ S, 87° 25′ 40.8″ W	View this and other nearby images on: Google Maps	-82.354000; -87.428000

This image or video was catalogued by Jet Propulsion Laboratory of the United States National Aeronautics and Space Administration (NASA) under Photo ID: PIA11706.

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This media is a product of the
Mars Reconnaissance Orbiter mission
Credit and attribution belongs to the High Resolution Imaging Science Experiment (HiRISE) team, NASA/JPL-Caltech/Univ. of Arizona

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