The arcuate ridge in this image, Beagle Rupes, is one of the tallest and longest scarps on Mercury. It is shown here deforming and shortening the elliptical impact crater Sveinsdóttir in the bottom left corner of the image. Beagle Rupes and other scarps on Mercury are thought to be the surface expressions of thrust faults that formed from contraction as the planet's interior cooled.
Date acquired: July 15, 2011
Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington