HiRISE (NASA): Marvelous Martian Mega-Ripples

“Mega-ripples” are distinct wind-driven formations that occur on the surface of Earth and Mars, often with sizes between that of smaller ripples and larger dunes. Thanks to repeat coverage by HiRISE, we can tell that some mega-ripple fields are active and migrating alongside dunes and ripples.

NASA/JPL-Caltech/UArizona
#Mars #science #NASA #geology