This video covers a location that has been imaged several times to look for changes in gullies. A lobate, rubbly flow has been deposited near the mouth of the channel between images. Further up the slope, the channel system has been modified by both erosion and deposition. Other images can pin down the timing of this flow more precisely. Changes have now been seen in many gullies on Mars, and show that these landforms are evolving rapidly. The timing of the changes is often in winter or early spring, suggesting that they are caused by the carbon dioxide frost that forms in and around most gullies every year. Video Credit: NASA/JPL/University of Arizona Caption Credit: Colin Dundas Release Date: July 10, 2014 #NASA #Mars #Gully #Erosion #Deposition #HiRISE #MRO #Reconnaissance #Orbiter #Planetary #Science #Video #JPL
Posted on: Sat, 19 Jul 2014 21:14:30 +0000
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