This image acquired on May 20, 2021 by NASAs Mars Reconnaissance Orbiter, shows the high plains about 25 kilometers (15 miles) south of Coprates Chasma, near the eastern end of the Valles Marineris canyon system.

July 28, 2021

Click here for larger image of PIA24700
Map Projected Browse Image
Click on image for larger version

This image covers the high plains about 25 kilometers (15 miles) south of Coprates Chasma, near the eastern end of the Valles Marineris canyon system. Here, the CRISM instrument on MRO has detected clay minerals, which imply substantial water-rock interactions in the past. These minerals often have a reddish- to yellow appearance in HiRISE images.

In this observation, the minerals appear concentrated along the boundaries of polygons up to 10 meters across. Perhaps the water-rock interactions at this site were most extensive within a network of pre-existing fractures dissecting the bedrock.

Rough, blue-to-purplish material appears to overlie the polygonal fractures in portions of the image. We also see lighter blue-to-green materials. While CRISM can provide a time constraint to the compositions of these varied materials, HiRISE shows us how they relate to each other and how such a colorful scene could have been assembled over geologic time.

The map is projected here at a scale of 50 centimeters (19.7 inches) per pixel. (The original image scale is 51.1 centimeters [20.1 inches] per pixel [with 2 x 2 binning]; objects on the order of 153 centimeters [60.2 inches] across are resolved.) North is up.

The University of Arizona, in Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., in Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.

Credit

NASA/JPL-Caltech/University of Arizona

ENLARGE

You Might Also Like