The surface to the west and north of this crater contains a large number of lunar domes spread across an area over a hundred kilometers in diameter that may be of volcanic origin dubbed the Marius Hills.

There is no central rise, but a small craterlet Marius G lies in the northeast part of the floor.

The area of this crater was one of the locations proposed for an Apollo mission, but the expedition was subsequently cancelled.

[1] This would be a likely location to consider moon colonization should the hole connect to a long enough section of ancient lava tube.

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