Diverse Layers and Mineralogy near Mawrth Vallis
NASA/JPL/University of Arizona
Diverse Layers and Mineralogy near Mawrth Vallis
ESP_024055_2045  Science Theme: Geologic Contacts/Stratigraphy
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This HiRISE image shows diverse layers in a region near Mawrth Vallis, a channel that was probably carved by water in Mars' ancient past. The color subimage shows details of layers exposed in a crater wall.

Tannish to white tones are apparent, which may be reflective of differences in mineralogy. CRISM, a spectrometer on MRO, has detected clays in Mawrth, so the layers here may be clay-rich.

Clays contain water, indicating that this region may have been wet in the past. The subimage also shows polygonal-like textures on some of the layered rock. These may be dessication polygons formed when the wet clays dried. The dark patches on the layers are sand dunes.

Written by: Nathan Bridges   (26 October 2011)

This is a stereo pair with ESP_024200_2045.

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Acquisition date
13 September 2011

Local Mars time:
14:17

Latitude (centered)
24.453°

Longitude (East)
341.200°

Range to target site
297.9 km (186.2 miles)

Original image scale range
59.6 cm/pixel (with 2 x 2 binning) so objects ~179 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
16.5°

Phase angle:
27.2°

Solar incidence angle
41°, with the Sun about 49° above the horizon

Solar longitude
0.1°, Northern Spring

North azimuth:
96°

Sub-solar azimuth:
333.4°
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Black & white is 5 km across; enhanced color about 1 km
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All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:
NASA/JPL/University of Arizona



Postscript
For information about NASA and agency programs on the Web, visit: http://www.nasa.gov. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems is the prime contractor for the project and built the spacecraft. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona. The image data were processed using the U.S. Geological Survey’s ISIS3 software.