High on the Tharsis bulge, in a graben (which is a down-dropped valley between two faults), there are concentrations of dark boulders streaming down the steep slopes. The slope goes downhill from top to bottom of the image. Some of the rocks form patterns suggestive of glacial flow, but if so there may be no ice remaining at the present time.

ID: ESP_013971_1675
date: 20 July 2009
altitude: 252 km

https://uahirise.org/hipod/ESP_013971_1675
NASA/JPL-Caltech/University of Arizona
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