Stunning Landscape Near Mamers Valles
NASA/JPL/University of Arizona
Stunning Landscape Near Mamers Valles
ESP_028313_2220  Science Theme: Geologic Contacts/Stratigraphy
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This region of Mars has been long studied for its evidence of glacial-like flow features. The landscape is dominated by flat top mesas and flat valley floors. But a closer look shows evidence that soil material is flowing ever so gradually from the edges of the mesas out into the valleys.

Such flow can result from excessively ice-rich deposits analogous to glaciers. “Streamlines” (curved ridges) mark the flow direction, while “flow fronts” mark where material has reached its furthest extent or where material has collided with an obstacle or otherwise bunched up.

The close up view from HiRISE reveals even stranger textures on the valley floor. Scarps and hills appear twisted like taffy, probably the result of the slow movement of the subsurface ice. Other areas that appear flat and smooth at lower resolution are expanses of extremely regular small pits and mounds at HiRISE resolution. One suggestion has been that these small-scale textures are the result of sublimation (evaporation) of subsurface ice combined with the taffy-like shifts in the ground surface.

Written by: Mike Mellon   (28 November 2012)

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Acquisition date
10 August 2012

Local Mars time:
15:23

Latitude (centered)
41.410°

Longitude (East)
14.661°

Range to target site
299.3 km (187.1 miles)

Original image scale range
59.9 cm/pixel (with 2 x 2 binning) so objects ~180 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
2.7°

Phase angle:
51.2°

Solar incidence angle
54°, with the Sun about 36° above the horizon

Solar longitude
153.0°, Northern Summer

North azimuth:
96°

Sub-solar azimuth:
346.5°
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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.