Dunes of sand-sized materials have been trapped on the floors of many Martian craters, as seen in this view captured by NASA Mars Reconnaissance Orbiter. This is one example, from a crater in Noachis Terra, west of the giant Hellas impact basin.
Dunes of sand-sized materials have been trapped on the floors of many Martian craters, as seen in this view captured by NASA Mars Reconnaissance Orbiter. This is one example, from a crater in Noachis Terra, west of the giant Hellas impact basin.