This mosaic shows an enormous flow-like feature that extends from the volcano flanks onto the adjacent plains, and which consists of hummocky terrain with faint concentric features. The flow terminates in fine scale ridges parallel to the flow's front edge. The origin of this feature is not clear, but it may be a major landslide that developed high on the flanks of the volcano at a time when the volcano slopes were unstable. The concentric ridges in distal parts appear to run through all the topographic features without substantially modifying them, and may be pressure ridges that developed in the underlying terrain at the foot of the unit. The image is about 1700 km across.
North is to the top of the image.