Geological Chronicle
Lundmark is an eroded crater on the far side of the Moon, measuring 103.44 kilometers in diameter. It lies to the southwest of Mare Ingenii, one of the rare mare areas on the far side. The flooded crater Jules Verne is located to the northwest, while the crater Koch is nearly attached to Lundmark's southwestern outer rim. The feature is named for Swedish astronomer Knut Emil Lundmark.
On the lunar geologic timescale, Lundmark dates to the Pre-Nectarian period. The formation is heavily worn and damaged, marked by smaller craters along its sides and interior. The satellite crater Lundmark B overlies the north-northeastern rim, and Lundmark D lies across the eastern rim. A cluster of small craterlets sits in the southeastern interior floor, with another grouping of craters in the uneven terrain between Lundmark and Koch.