File:PIA21142 - Opportunity View of 'Private Joseph Field' on Mars, Figure 1.jpg

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Description	Original entry English: This image of a target called "Private Joseph Field" combines four images from the microscopic imager on the robotic arm of NASA's Mars Exploration Rover Opportunity, with enhanced color information added from the rover's panoramic camera. This target is within the "Marathon Valley" area of the western rim of Endeavour Crater. The component images were taken on May 29, 2016, during the 4,389th Martian day, or sol, of Opportunity's work on Mars. The mosaic shows an area spanning about 2 inches (5 centimeters). Geochemical data indicate the presence of magnesium and iron sulfates at this location, most likely corresponding to the white pebble visible near the center of the image. These sulfates may have formed by the interaction of acidic fluids with the rocks along the rim of Endeavour crater. JPL manages the Mars Exploration Rover Project for NASA's Science Mission Directorate in Washington. For more information about Spirit and Opportunity, visit http://marsrovers.jpl.nasa.gov.
Date	29 May 2016 (published 7 December 2016)
Source	Catalog page · Full-res (JPEG · TIFF)
Author	NASA/JPL-Caltech

Location on Mars	2° 18′ 48.58″ S, 5° 20′ 58.52″ W	View this and other nearby images on: Google Maps	-2.313494; -5.349589

This image or video was catalogued by Jet Propulsion Laboratory of the United States National Aeronautics and Space Administration (NASA) under Photo ID: PIA21142.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

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This media is a product of the
Mars Exploration Rover mission
Credit and attribution belongs to the mission team, if not already specified in the "author" row

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