High-Resolution Stereo Camera (HRSC) nadir and color channel data taken during revolution 10,736 on June 6, 2012, by ESAт??s Mars Express have been combined to form a natural-color view of Nereidum Montes. Centered at around 40ТАS and 310ТАE, the image has a ground resolution of about 23m per pixel. It shows a portion of the extensive region, with concentric crater fill in many of the craters towards the east (lower part of the image). Undulations in crater floors are commonly seen in mid-latitude regions on Mars and are believed to be a result of glacial movement. // Credits: ESA/DLR/FU Berlin (G. Neukum)