Geological Chronicle
Mons Rümker is an isolated volcanic formation in the northwestern region of the Moon's near side, located in northern Oceanus Procellarum. The complex forms a broad elevated mound spanning a diameter of 73.25 kilometers and climbs to a maximum elevation of approximately 1,300 meters above the surrounding plain. The feature bears the name of German astronomer Karl Ludwig Christian Rümker.
Across the top lies a concentration of 22 lunar domes—rounded bulges that resemble shield volcanoes. These wide, circular features rise a few hundred meters with gentle slopes, and some contain a small craterlet at the peak. The domes formed as lava erupted from localized vents and cooled relatively slowly.
A perimeter scarp separates Mons Rümker from the adjacent mare plain, with plateau edges rising 900 meters in the west, 1,100 meters in the south, and 650 meters in the east. Spectroscopic observations show a uniform surface of lunar mare material, representing an estimated extruded lava volume of 1,800 cubic kilometers.
Directly northeast of Mons Rümker lies Statio Tianchuan, a young lava plain that served as the landing site of the Chang'e 5 mission.