Geological Chronicle
Situated in the southeastern reach of Lacus Somniorum in the Moon's northeastern quadrant, Hall spans 31.77 kilometers in diameter to the east of the prominent walled plain Posidonius. Its southern margin stands nearly attached to the smaller crater G. Bond, while the irregular satellite crater G. Bond G abuts its southeastern rim against the rugged terrain bordering the mare.
Smaller impact events have disintegrated the outer wall, producing a notched and heavily incised perimeter. A major gap along the western rim permitted basaltic lava to flood the interior, submerging the floor and leaving behind an irregular, crescent-shaped remnant along the mare boundary.
Across the open western breach runs Rima G. Bond, a wide lunar cleft that begins north of Hall. The fissure cuts south-southwest across the mare plain before curving back toward the south-southeast, traversing a raised ridge that connects to Hall's southern rim and encloses crater G. Bond.