Bruce Murray Space Image LibraryHalf-hollowed crater Half-hollowed crater An unnamed 80-kilometer crater struck the southern rim of Mercury's Rembrandt impact basin. Its northern part is inside Rembrandt, its southern part outside it. Rembrandt is filled with brighter material; the area outside Rembrandt is made of so-called low-reflectance material. (The boundary between the two slants across this image from upper left to lower right.) Inside the small crater, hollows have formed, but only on the part of the crater that crosses the low-reflectance material. NASA / JHUAPL / CIW / Emily LakdawallaThis image is cropped from a mosaic of MESSENGER images CN0234362899M_IF_4, CN0234362903M_IF_4, and CN0234363338M_IF_4.