Mamers Valles

The Mamers Valles are a set of channels in a long, winding canyon in the north of Mars.

The Mamers Valles are dated to the early Hesperian period, about 3.8 billion years ago.

Such canyons (with rounded headwalls and no obvious overland infeeders) have been widely presumed to have formed by a process of seepage erosion.

The case is supported by comparison with Box Canyon, Idaho, USA, which shows a similar morphology, but also exhibits features such as plunge pools, rock scours on the headwall rim, and a notch on the headwall rim, suggestive of large-volume flow.

This article about geology, geography or other features of the planet Mars or its moons is a stub.

Glacial-like flow features near the Mamers Valles. Scarps and hills appear twisted like taffy, probably the result of the slow movement of the subsurface ice. Note the patterned ground at top center. These small-scale textures may be the result of sublimation (evaporation) of subsurface ice combined with the taffy-like shifts in the ground surface. Width of image is about a kilometer.