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PIA24918: The Writing is on the Wall
This image acquired on August 7, 2021 by NASA's Mars Reconnaissance Orbiter, shows curved, scalloped ridges, called moraines, that are made up of rocks that the glacier collected as it moved downslope.
 Target Name:  Mars
 Is a satellite of:  Sol (our sun)
 Mission:  Mars Reconnaissance Orbiter (MRO) 
 Spacecraft:  Mars Reconnaissance Orbiter (MRO)
 Instrument:  HiRISE 
 Product Size:  2880 x 1800 pixels (w x h) 
 Produced By:  University of Arizona/HiRISE-LPL 
 Other  
Information: 		 Other products from ESP_070461_2245 
 Full-Res TIFF:  PIA24918.tif (15.56 MB)
 Full-Res JPEG:  PIA24918.jpg (765.1 kB)  

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Original Caption Released with Image:

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These U-shaped ridges along this crater's interior wall provide clues to an ice-rich past. The curved, scalloped ridges, called moraines, are made up of rocks that the glacier collected as it moved downslope.

Even after the ice disappears, the glacial moraines remain, marking the furthest extent (or end) of the glacier. The parallel linear ridges on the wall may mark past levels of the glacier. Although glaciers move slowly, ice is a very powerful way to modify the surface of a planet.

The map is projected here at a scale of 50 centimeters (19.7 inches) per pixel. (The original image scale is 60.9 centimeters [24.0 inches] per pixel [with 2 x 2 binning]; objects on the order of 183 centimeters [72.0 inches] across are resolved.) North is up.

The University of Arizona, in Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., in Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.

Image Credit:
NASA/JPL-Caltech/University of Arizona

Image Addition Date:
2021-10-19