Go with the Flow
NASA/JPL/University of Arizona
Go with the Flow
ESP_020822_2220  Science Theme: Aeolian Processes
Spanish   Portuguese   Italian   Greek   


800  1024  
1152  1280  
1440  1600  
1920  2048  


PDF, 11 x 17 in  
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)

Click to share this post on Twitter Click to share this post on Facebook Click to share this post on Google+ Click to share this post on Tumblr

 Image Products: All image links are drag & drop for HiView, or click to download
B&W: map projected  non-map

IRB color: map projected  non-map

Merged IRB: map projected

Merged RGB: map projected

RGB color: non-map projected

B&W: map-projected (545MB)

IRB color: map-projected (307MB)
B&W: map-projected  (276MB),
non-map  (191MB)

IRB color: map projected  (85MB)
non-map  (237MB)

Merged IRB: map projected  (160MB)

Merged RGB: map-projected  (155MB)

RGB color: non map-projected  (248MB)
Map-projected reduced-resolution (PNG)
Full resolution JP2 download
View anaglyph details page

B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

About color products (PDF)
HiView main page

 Observation Toolbox
Acquisition date:04 January 2011 Local Mars time:15:31
Latitude (centered):41.761° Longitude (East):44.163°
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 upMap projection:Equirectangular
Emission angle:11.8° Phase angle:63.0°
Solar incidence angle:73°, with the Sun about 17° above the horizon Solar longitude:211.3°, Northern Autumn

Context map

Usage Policy
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
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.