Public domain
Ripples and Dunes in Proctor Crater
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
NASA's Mars Reconnaissance Rover (MRO) has observed two types of wind (aeolian) features in Proctor Crater: large, dark features that are sand dunes, made up of basaltic particles, and smaller, light-toned ripples that we call "TAR," or "transverse aeolian ridges." The origin of the TARs is a mystery. They might be dust deposits, or perhaps coarse grained ripples that are coated in bright dust.
NASA Image and Video Library’s own descriptionCredit lineRipples and Dunes in Proctor Crater. NASA/JPL, 2017-10-09. Public domain. ID: PIA22040.
