File:An Active Gully in Matara Crater (PIA23853).jpg

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Captions

Captions

Gullies in the sand dunes of Matara Crater are very active. One large gully in particular has had major changes in every Martian winter since HiRISE began monitoring, triggered by the seasonal dry ice frost that accumulates each year.

Summary

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Description
English: Gullies in the sand dunes of Matara Crater are very active. One large gully in particular has had major changes in every Martian winter since HiRISE began monitoring, triggered by the seasonal dry ice frost that accumulates each year. This time there was an especially large change, depositing a huge mass of sand. The sand divided into many small toes near its end, or perhaps many individual flows descended near the same spot. Additionally, a long sinuous ridge of sand was deposited. This could be a "levee" that formed along one side of a flow, but there is not much sand past the end of the ridge, so it might also be the main body of a flow. How many changes can you see in the cutout? https://ppj2.jpl.nasa.gov/catalog/PIA23853
Date Taken on 17 April 2020
Source
This image or video was catalogued by Jet Propulsion Laboratory of the United States National Aeronautics and Space Administration (NASA) under Photo ID: PIA23853.

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Author NASA Jet Propulsion Laboratory

Licensing

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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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