Sirsalis 12.5°S, 60.4°W

Rimae Sirsalis 15.7°S, 61.7°W

Sirsalis is a crater 42 km across, with a central peak. It overlaps the crater Sirsalis A, 49 km across, which was formerly known as Bertaud. Sirsalis J, directly adjoining Sirsalis to the southeast, is a small crater, 12 km in diameter and the centre of a small ray system. The 3-km wide rille Rima Sirsalis run north-south on the eastern side of Sirsalis, and which is easily seen even in small telescopes. Rima Sirsalis is a fracture zone, possibly caused by the Orientale impact. To the south, Rima Sirsalis merges directly into the rille system Rimae Darwin. The widest of the Sirsalis rilles has an overall length of more than 300 km.

A narrow ridge begins at the northern wall of Sirsalis and forms the eastern wall of the crater Sirsalis Z (91 km), which casts a bizzare triangular shadow around the 12th day after New Moon. The floor of Sirsalis Z is smooth and level, and a distant portion of Rimae Grimaldi ends inside the northeastern crater wall.

Sirsalis E (8.0°S, 56.0°W) is a crater, 80 km across, that is almost completely flooded by the Oceanus-Procellarum lavas. Only the western wall and a small section of the eastern crater wall are visible.