Colorful Layers Exposed in the Walls of an Impact Crater
NASA/JPL/University of Arizona

Colorful Layers Exposed in the Walls of an Impact Crater
ESP_028693_1535  Science Theme: Impact Processes
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This image covers most of an impact crater about 6 to 7 kilometers wide. Partway down from the crater rim is a prominent bright layer of bedrock.

The full-resolution color data shows three distinct bedrock colors: yellow, light blue-green, and dark blue (in enhanced infrared colors). (North is down in the cutout, so the crater rim is near the top, which helps my brain to interpret the geometry.) These layers must correspond to different types of rock that were deposited as nearly flat-lying sheets, perhaps a combination of lava flows and sediments.

The relatively blue colors in HiRISE infrared color often correspond to minerals like olivine and pyroxene that are common in lava.

Written by: Alfred McEwen   (3 October 2012)



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Acquisition date:09 September 2012 Local Mars time: 3:39 PM
Latitude (centered):-26.092° Longitude (East):88.942°
Range to target site:257.7 km (161.0 miles)Original image scale range:51.6 cm/pixel (with 2 x 2 binning) so objects ~155 cm across are resolved
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Emission angle:5.0° Phase angle:66.0°
Solar incidence angle:61°, with the Sun about 29° above the horizon Solar longitude:168.7°, Northern Summer
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North azimuth:97° Sub-solar azimuth:27.7°
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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.