Moraine on a Martian Box Canyon (IMAGE) Brown University Caption This high-resolution image, taken by the Mars Reconnaissance Orbiter, shows the rock debris that Brown scientists believe was left by a glacier that rose at least one kilometer from the surrounding plain and flowed downward onto the canyon. The image is on the cover of May's issue of Geology magazine. Credit NASA Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.