Geological Chronicle
Banachiewicz consists of the remains of an impact crater located near the eastern limb of the Moon. From Earth, this position appears significantly foreshortened, and lunar libration more than partly affects its visibility, at times completely concealing the formation. To the northeast lies the large walled plain Neper on the southern edge of Mare Marginis, while Schubert sits to the south and Schubert E connects to the exterior of the western rim.
The crater is a heavily degraded walled plain. Parts of the western and southwest rim survive as low ridges in the surface, while the rest forms irregular terrain with little definition. Across the northeast rim lie two small craters.
Two notable impact craters lie within the interior. Banachiewicz B is adjacent to the western rim, while Knox-Shaw lies closer to the midpoint on the eastern floor as a bowl-shaped formation 13.44 km in diameter. Originally named Banachiewicz F, Knox-Shaw has a circular rim sloping to a small interior floor, showing no significant erosion or other distinguishing features.