Lobate Flow Features in the Northwest Hellas Rim, a photo by Lunar and Planetary Institute on Flickr.
Via Flickr:
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 (Shallow Subsurface Radar) of other lobate features in this latitude belt also support the notion that these features have cores with ice.
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