Dark dunes fill part of the floor of this unnamed crater in Terra Sirenum. There are numerous gullies on the rim of the crater. Winds are moving the sand towards the upper left of this image, filling the lower sections of many gullies. Orbit Number: 75020 Latitude: -52.6235 Longitude: 215.879 Instrument: VIS Captured: 2018-11-12 09:26 https://photojournal.jpl.nasa.gov/catalog/PIA22988