This image, taken by HiRISE, shows a lobate tongue on the Northwest Hellas rim.
Lobate features such as these are located in the mid-latitudes (30-60 degrees), indicative of viscous flow, are reminiscent of terrestrial glaciers and have long-been interpreted as evidence for subsurface ice.
Recent ground penetrating radar observations by SHARAD of other lobate features in this latitude belt also support the notion that these features have cores with ice.
Written by: Eldar Noe (19 October 2011)
This is a stereo pair with ESP_023710_1425 .
More info and image formats at http://hirise.lpl.arizona.edu/ESP_024000_1425
Image: NASA/JPL/University of Arizona