“Banded TARs in Iapygia”
This image of banded Tranverse Aeolian Ridges (TARs) north of Hellas Planitia (18.707° S, 62.601° E) was taken by HiRISE on January 1st, 2011. TARs are formed by wind and are larger than ripples but smaller than dunes. They are inactive and their internal structure is mostly unknown so it is hard to determine their origin. Understanding the dynamics of TARs could help reveal the past climate and wind conditions on Mars.
The width of this image is about 1 km.
Credit: NASA/JPL/University of Arizona