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Field of Transverse Aeolian Ridges in Proctor Crater
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Field of Transverse Aeolian Ridges in Proctor Crater

January 6, 2012
Transverse Aeolian Ridges (or TARs) are small aeolian bedforms that are distinct from typical dunes or ripples. TARs are found all over Mars, and are typically located near layered terrains, or near fields of large dark dunes as they are here in Proctor Crater in the Southern hemisphere.

TARS form transverse (perpendicular) to the wind direction and are thought to be composed of coarse-grained material. They also appear to be indurated (hardened) and may be much less mobile than the larger dunes.

Written by: Dan Berman

Credits: NASA/JPL/University of Arizona