The rim has a significant outer rampart brightened with ejecta and the upper portion of a terraced inner wall, but lacks the ray system associated with younger craters.

Scattered wisps of bright ray material lie across the floor, most likely deposited by the impact that created Autolycus.

On the southeastern rim is the Palus Putredinis, a lava-flooded plain containing a system of rilles named the Rimae Archimedes, which extends over 150 kilometers.

The lava plain between Archimedes, Aristillus, and Autolycus forms the Sinus Lunicus bay of Mare Imbrium.

[6] By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Archimedes.