Lunar Mare Domes - John Seach

Eighty low domes have been mapped on the moon's near side. They have slopes of 2-3 degrees,
diameters 2.5 to 24 km, and heights from 100 to 250 m. There are summit craters of fissures on some domes.
Little is known about their formation.

Marius Hills, Oceanus Procellarum
Rumker Hills, Oceanus Procellarum
 

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