Polygonal Ridge
Date: 9 Apr 2010

In the Gordii Dorsum region of Mars there is a large area covered with polygonal ridges in an almost geometric pattern. The ridges may have originally been dunes that hardened through the action of an unknown process. It is possible that groundwater may have been involved in that process.


This is an enhanced-color view generated from images acquired by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter (MRO).


Images from the HiRISE instrument and additional information about the Mars Reconnaissance Orbiter are available online at: http://HiRISE.lpl.arizona.edu and http://www.nasa.gov/mro.


JPL, a division of the California Institute of Technology in Pasadena, 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 & Technologies Corporation and is operated by the University of Arizona.


Last Update: 8 Jun 2011 (AMB)

Credit: NASA/JPL-Caltech/University of Arizona