Jumbled Flow Patterns
NASA/JPL/University of Arizona
Jumbled Flow Patterns
PSP_006278_2225  Science Theme: Glacial/Periglacial Processes

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Unusual surface patterns near the center of Moreux Crater suggest a complicated history of glacial flow. A series of ridges and troughs originating from the crater’s central peak to the west of this image terminate in this area in a jumble of twisted patterns and circular depressions.

The superposition of impact craters and sand dunes on top of these ridges and troughs suggests that the flow patterns are old and that any ice may be largely gone. The round depressions may have formed when large sections of relatively clean ice were left in place to melt or sublimate (evaporating ice directly to gas). The ridges would be analogous to moraines in Earth glaciers, formed from rock and debris mixed with the ice that flow with the glacier.

The complicated and twisting patterns indicate that the ice flowed into this area, which is at a lower elevation on the crater floor, and piled up behind itself as the flow stalled. Numerous boulders are also scattered over the surface of ridges and troughs. Boulders may have been carried into place with the ice and as the ice was removed, the boulders were left in place.Written by: Mike Mellon   (10 January 2008)

This is a stereo pair with PSP_010695_2225.

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Acquisition date
28 November 2007

Local Mars time:
14:10

Latitude (centered)
41.985°

Longitude (East)
44.682°

Range to target site
298.6 km (186.7 miles)

Original image scale range
29.9 cm/pixel (with 1 x 1 binning) so objects ~90 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
0.4°

Phase angle:
53.5°

Solar incidence angle
53°, with the Sun about 37° above the horizon

Solar longitude
354.4°, Northern Winter

North azimuth:
97°

Sub-solar azimuth:
317.7°
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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.