Mons Rümker
Mons Rümker This image of Mons Rümker on the Moon was captured by Apollo 15 astronauts in 1971. Located in Oceanus Procellarum—the Ocean of Storms—Mons Rümker is a raised region formed by volcanic activity late in the Moon's history. It is about 70 kilometers wide and rises more than a kilometer above the surrounding area. NASA