4. Dark-Halo Crater on the Floor of Schrödinger Basin

4. Dark-Halo Crater on the Floor of Schrödinger Basin
4. Dark-Halo Crater on the Floor of Schrödinger Basin

Detail from the UV-VIS camera of the floor of the basin Schrödinger, showing the coverage (inset strip) of the high-resolution camera for comparison. The dark halo crater (center at 76°S, 139°E; 5 kilometers across) is a volcanic vent that erupted ash during the period of mare volcanism on the Moon, more than 3.5 billion years ago.

Image processing by U.S. Geological Survey, Flagstaff, Arizona.