Ripple Trap

This Mars Global Surveyor MGS Mars Orbiter Camera MOC image shows the 
margin of a lava flow on a cratered plain in the Athabasca Vallis region 
of Mars. Remarkably, the cratered plain in this scene is essentially free 
of bright, windblown ripples

This Mars Global Surveyor MGS Mars Orbiter Camera MOC image shows the margin of a lava flow on a cratered plain in the Athabasca Vallis region of Mars. Remarkably, the cratered plain in this scene is essentially free of bright, windblown ripples