“…[13] At the pole-facing slope of the crater wall, a wide network of polygon-shaped features with sharp, crisply delineated, and low center features bounded by thin, wide troughs and boulders plugged at the edges can be very frequently seen [Levy et al, 2009]. These polygons have been termed as thermal contraction crack polygons (TCPs) and morphologically represented and studied in the past while comparing their formation mechanism with that of terrestrial analogue polygonal features [van Gasselt et al, 2005;Levy et al, 2006Levy et al, , 2008aLevy et al, , 2008bLevy et al, , 2009Levy et al, , 2010b. TCPs have been also used extensively in previous studies in the interpretation of climate history, stratigraphy of periglacial and glacial activities, and polar hydrology and in cold desert ecology [Leffingwell, 1915;Lachenbruch, 1962;Washburn, 1973;Marchant et al, 1993Marchant et al, , 2002Doran et al, 2002;French, 2003;Kowalewski et al, 2006;Marchant and Head, 2007;Levy et al, 2008aLevy et al, , 2008bLevy et al, , 2009.…”