A massive blob of ancient granite has been found lurking beneath the Moon's surface, evidence of a type of volcanism we've never seen there before.
Analysis suggests it's a deeply buried giant mass of solidified magma, or, deposited some 3.5 billion years ago. We see this on Earth fairly frequently, but planetary scientists are excited to observe it on the Moon.
"Any big body of granite that we find on Earth used to feed a big bunch of volcanoes, much like a large system is feeding the Cascade volcanoes in the Pacific Northwest today,"of Southern Methodist University and the Planetary Science Institute. "Batholiths are much bigger than the volcanoes they feed on the surface. For example, the Sierra Nevada mountains are a batholith, left from a volcanic chain in the western United States that existed long ago."Granite is abundant on Earth but extremely rare elsewhere in the Solar System since it requires specific conditions to form.
Those conditions include a lot of liquid water, and plate tectonics, which help melt and recycle material in the planet's crust. Granite production requires multi-stage remelting of basaltic rock, or
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