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:15:39
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
Map projected scale:50 cm/pixel and North is upMap projection:Equirectangular
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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