This 170-km diameter differs in form from the volcanoes previously illustrated. The caldera has a wide bench round one side. This bench may represent an early lava lake level before further collapse occurred in the middle of the caldera.
Scarps intersecting the caldera appear to be normal faults rather than graben.
The base of the volcano is covered by younger materials so its original size cannot be determined. The image is about 200 km across. North is to the top of the image.