But I'm a Creep
This very high resolution image shows the interior of a crater in Mercury's northern hemisphere. Near the base of the crater's northern wall, we can see a subtle curving line, indicated by the arrows. The line represents the edge of a lobe of material that has likely formed by slow movement of loose regolith down the steeper parts of the crater wall under the action of gravity. Geologists refer to this type of movement as "creep."
Date acquired: February 26, 2012
Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington