The Lee-Lincoln Scarp on the Moon. This digital terrain model derived from Lunar Reconnaissance Orbiter Camera (LROC) stereo images shows the fault scarp extending across the volcanic plains of the Taurus-Littrow valley and upslope into North Massif were highlands material are also thrust up (white arrows). The scarp is just west of the Apollo 17 landing site (black arrow). It is the only extraterrestrial fault scarp to be explored by humans (astronauts Eugene Cernan and Harrison Schmitt).