File:Bedrock in Nilosyrtis Mensae.jpg

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English: The Color Palette of Nilosyrtis Mensae

ESP_028825_2070 Science Theme: Fluvial Processes

The region of Mars north of the Syrtis Major volcanics and the Isidis impact basin has well-exposed bedrock with diverse compositions. These regions are dark so the colors aren't well seen except with a sensitive imager like HiRISE and special processing.

The blue and green colors are generally due to mafic (magnesium and iron rich) minerals that are not altered by water, while the warmer colors are due to altered minerals like clays. The structure in this scene is quite complex from a combination of impact and perhaps fluvial and volcanic processes, tectonic faulting, and erosion.

The terrain is very old and has experienced a complex geologic history.
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Source http://hirise.lpl.arizona.edu/ESP_028825_2070
Author NASA HiRISE camera, Mars Reconnaissance Orbiter.
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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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