The crater formation is nearly circular, however, with a wide inner wall that has been worn and rounded due to subsequent impacts.

The eroded and somewhat distorted satellite crater Boole E is attached to the southern rim, forming a saddle-shaped valley between the two formations.

The surface along the western face of Boole is pock-marked by a multitude of small craterlets that run in a northerly direction towards Brianchon.

A sequence of these impacts forms a short catena, or crater chain, near the western rim of Boole.

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