HiRISE | Go with the Flow (ESP_020822

NASA/JPL/University of Arizona

Go with the Flow
ESP_020822_2220 Science Theme: Aeolian Processes

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This image shows flows with rather large ridges extending down off of the central mountains of Moreux Crater.

What made those flows? It doesn't look like lava, and the central mountains are not volcanoes--they were thrust up by the impact event. Instead, it may be that these were flows of ice, or glaciers. There are lots of boulders on the surface, and glaciers tend to carry lots of rocks.

The Shallow Radar (SHARAD) experiment on MRO is able to penetrate through ice, confirming that many features such as this one are composed of ice, with a thin cover on non-icy material. The existence of glaciers on Mars was controversial more than 10 years ago, but not today.

So far we have seen no evidence for currently active glaciers on Mars, but maybe they are moving very slowly. This image is actually a repeat image of this site.

Written by: Alfred McEwen (3 February 2011)

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Acquisition date:	04 January 2011	Local Mars time:	3:31 PM
Latitude (centered):	41.762 degrees	Longitude (East):	44.163 degrees
Range to target site:	305.4 km (190.9 miles)	Original image scale range:	from 30.6 cm/pixel (with 1 x 1 binning) to 61.1 cm/pixel (with 2 x 2 binning)
Map projected scale:	25 cm/pixel and North is up	Map projection:	EQUIRECTANGULAR
Emission angle:	11.8 degrees	Phase angle:	63.0 degrees
Solar incidence angle:	73 degrees, with the Sun about 17 degrees above the horizon	Solar longitude:	211.3 degrees, Northern Autumn
For non-map projected products:
North azimuth:	96 degrees	Sub-solar azimuth:	328.3 degrees
For map-projected products
North azimuth:	270 degrees	Sub solar azimuth:	145.0 degrees

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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: Image: 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.