The Eastern Floor of Aram Chaos
NASA/JPL/University of Arizona

The Eastern Floor of Aram Chaos
ESP_024266_1830  Science Theme: Aeolian Processes
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This image is located within Aram Chaos near the outlet to Ares Valles. Aram Chaos is a 1300 kilometer (approximately 800 miles) diameter depression from which enormous cataclysmic releases of ground water are thought to have exploded onto the surface of Mars. The water then flowed northwards across the southern highlands, helping to carve the approximately 2000 kilometer (1200 miles) long Ares Valles outflow channel system.

A variety of landforms, terrain units and dune fields are visible in this image. In the enhanced color subimage, this portion of Aram Chaos is seen to be composed of isolated hills and eroding mesas, surrounded by a mantle of dark-toned eroded material. A variety of dunes and light-toned units fill the lower elevations between upland terrains.

This is one of many regions where the HiRISE team is obtaining repeat imaging to study active dune field movements. The interplay between the dunes, eroded landforms and the various other light and dark-toned materials provides clues to the relative ages of the geologic processes and the nature of the materials.

Written by: Ginny Gulick   (2 November 2011)

This is a stereo pair with ESP_023910_1830.



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Acquisition date:30 September 2011 Local Mars time: 2:12 PM
Latitude (centered):3.112° Longitude (East):340.169°
Range to target site:303.4 km (189.6 miles)Original image scale range:30.4 cm/pixel (with 1 x 1 binning) so objects ~91 cm across are resolved
Map projected scale:25 cm/pixel and North is upMap projection:Equirectangular
Emission angle:26.8° Phase angle:59.7°
Solar incidence angle:33°, with the Sun about 57° above the horizon Solar longitude:8.2°, Northern Spring
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North azimuth:97° Sub-solar azimuth:7.9°
For map-projected products
North azimuth:270°Sub solar azimuth:181.6°

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All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible: Image: NASA/JPL/University of Arizona
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For information about NASA and agency programs on the Web, visit: http://www.nasa.gov. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems is the prime contractor for the project and built the spacecraft. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona. The image data were processed using the U.S. Geological Survey’s ISIS3 software.