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This example shows a section of crater wall from the rocky crater rim at the far left of the image, down to the dark dusty dunes on the crater floor in the bottom right. (North is to the left.) The rock of the crater walls shows up deep orange, and the sandy deposits on the crater floor and the base
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The gullies in this image have two main sections: a scalloped alcove at the top of the gully (left/center), and defined channel sections further down the crater wall (right/center). Material from the alcove will have traveled down the channel to the crater floor. This normally forms a third section
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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,
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to a typical gully, a debris fan. Fans commonly visible at the base of gullies are not obvious in this example however, as the wind blown sediments (blue) have covered the crater floor after gully formation.
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Gullies are relatively common features in the steep slopes of crater walls, possibly formed by dry debris flows, movement of carbon dioxide frost, or perhaps the melting of ground ice.
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of the crater walls appear blue. The sand isn’t really blue; the different colors in this image represent different material compositions.
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joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use.
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English Knowledge (XXG) use this file (pages on other projects are not listed):
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states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."
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This image or video was catalogued by Jet
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This tag does not indicate the copyright status of the attached work.
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If you have an image of similar quality that can be published under a
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Click on a date/time to view the file as it appeared at that time.
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data may be copyrighted if they are not explicitly produced by the
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PIA11178 - The
Contrasting Colors of Crater Dunes and Gullies.jpg
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50° 25′ 44.4″ S, 30° 37′ 04.8″ W
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The NASA website hosts a large number of images from the
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work of the federal government of the United States
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