This observation covers gullies that were previously identified in the walls of a crater in a MOC image (E0502675).
Do these gullies have features that can be interpreted as characteristic of snow and/or ice melting? At HiRISE resolution, questions like this can possibly be answered.
HiRISE often re-images areas to track seasonal changes, so we expect to monitor these gullies for changes at intervals during several Mars years.
This caption is based on the original science rationale.
Written by: HiRISE Science Team (30 November 2011)
More info and image formats at http://hirise.lpl.arizona.edu/ESP_023937_2240
Image: NASA/JPL/University of Arizona