NASA Spacecraft Reveals Recent Geological Activity on the Moon

Smithsonian Instituion Senior Scientist Tom Watters explains more about the moon's recent geological activity in this short video.

The largest of the newly detected graben found in highlands of the lunar farside. The broadest graben is about 500 m wide and topography derived from Lunar Reconnaissance Orbiter Camera (LROC) Narrow Angle Camera (NAC) stereo images indicates they are almost 20 m deep.

Credit: NASA/GSFC/Arizona State University/Smithsonian Institution

A series of graben in a patch of mare basalts that occupy a valley south of Mare Humorum cut across and deformed several small diameter impact craters. The walls and floors of the graben crosscut a degraded 27 m diameter crater (inset, upper white arrow) and a 7 m diameter crater (inset, lower white arrow). Since small craters only have a limited lifetime before they are destroyed by other impacts, their deformation by graben indicates that these fault-bound troughs are relatively young.

Credit: NASA/GSFC/Arizona State University/Smithsonian Institution

Newly detected series of narrow linear troughs are known as graben, and they fomed in highland materials on lunar farside. Forces acting to pull the lunar crust apart formed the Virtanen graben, informally named for a nearby impact crater. These graben are located on a topographic rise with several hundred meters of relief revealed in topography derived from Lunar Reconnaissance Orbiter Camera (LROC) Narrow Angle Camera (NAC) stereo images (blues are lower elevations and reds are higher elevations). The rise is flanked by the rim of a ~2.5 km diameter degraded crater.

Credit: NASA/GSFC/Arizona State University/Smithsonian Institution

Interview with Thomas Watters, Senior Scientist, Smithsonian Institution, National Air and Space Museum.