Martian Mélange
NASA/JPL/University of Arizona
Martian Mélange
ESP_029484_1670  Science Theme: Composition and Photometry
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“Mélange” means a confusing mixture, and is used to describe rocks scraped off the top of a downward-moving tectonic plate in a subduction zone on Earth. On Mars it is probably mostly impact cratering that creates such chaotic mixture of rock types rather than plate tectonics.

These warm, enhanced colors are due to minerals altered by water, whereas the blue and green colors are from unaltered minerals such as olivine and pyroxene.

This image was acquired in Tyrrhena Terra, some of the most ancient highlands of Mars.

Written by: Alfred McEwen   (28 November 2012)

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Acquisition date:09 November 2012 Local Mars time:15:37
Latitude (centered):-12.716° Longitude (East):91.424°
Range to target site:260.3 km (162.7 miles)Original image scale range:52.1 cm/pixel (with 2 x 2 binning) so objects ~156 cm across are resolved
Map projected scale:50 cm/pixel and North is upMap projection:Equirectangular
Emission angle:5.0° Phase angle:58.3°
Solar incidence angle:53°, with the Sun about 37° above the horizon Solar longitude:204.0°, Northern Autumn

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