The dunes seen in this VIS image are located on the complex floor of Rabe Crater. The sand is likely derived by erosion into the deposit that fills most of the crater floor, creating a pit which hosts the dunes. Rabe Crater is located in Noachis Terra and is 108km in diameter (67 miles). Orbit Number: 84285 Latitude: -44.1162 Longitude: 34.3444 Instrument: VIS Captured: 2020-12-14 07:25 https://photojournal.jpl.nasa.gov/catalog/PIA24360