Mars - Viking 2 Orbiter

Dune fields in the south polar plains of Mars

Mars
Viking 2 Orbiter image of Mars. Dune fields are visible within a 50 km impact crater in the top right corner of the frame. This area is in the high-latitude south polar plains. The frame is 150 km wide and north is up. (Viking Orbiter 479B71) 

Mars
Viking Missions
Mars: Geology
Aeolian Transport