This VIS image shows part of the bright material on the floor of Pollack Crater. Erosion by wind action has sculpted the material, forming the linear features that run from bottom right to upper left. The material, while brighter in contrast than the surrounding materials, is not white. Orbit Number: 66427 Latitude: -7.97233 Longitude: 25.1327 Instrument: VIS Captured: 2016-12-04 11:54 http://photojournal.jpl.nasa.gov/catalog/PIA21295