China’s Moon Rocks Prove Existence of Lava Flowing on the Moon’s Surface 1.97 billion Years Ago

Oceanus Procella rum, or the Ocean of Storms, is a dark-grey region in the Moon's northwest quarter that may be viewed without a telescope from Earth. The landing site, which is near Mons Rümker, a 70-kilometer-wide mound, may contain rocks and soil that are just 1.2 billion years old, because of a huge volcanic eruption that buried the underlying surface.