This HiRISE image shows a group of cones, shield-like features, and round mounds. They are a few hundred meters to kilometers in diameter. Possible origins include sedimentary (mud) volcanism and magmatic volcanism. HiRISE data are essential for evaluating these hypotheses.

This caption is based on the original science rationale.

Written by: HiRISE Science Team   (21 September 2011)

This is a stereo pair with ESP_023726_1995 .

More info and image formats at http://hirise.lpl.arizona.edu/ESP_023304_1995

Image: NASA/JPL/University of Arizona