Murchison lies astride the lunar zenith line, i.e. the starting longitude of the selenographic coordinate system.

The wall of Murchison is heavily worn and has completely disappeared in a wide gap to the southeast.

Only a ridge remains of the rim shared by Pallas and Murchison, with gaps to the north and south.

The crater floor has been flooded with lava and joins the Sinus Medii through the wide gap in the southeast wall.

By convention, these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Murchison.