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Old 09-20-2018, 08:36 PM   #29 (permalink)
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??? You cut out the part where I was quoting someone else? (DDG since I didn't evaluate their link)

I agree that it's more likely the old Pacific not-ocean flung into space. I thought it was doubtful anything could penetrate to the core. The impact that led to the Snake River basin and Yellowstone apparently only penetrated 40-50 miles into the Earth's mantle.

Now I have to go look whether the Moon even has a core. ... Yup.
Several lines of evidence imply that the lunar core is small, with a radius of about 350 km or less.[3] The size of the lunar core is only about 20% the size of the Moon itself, in contrast to about 50% as is the case for most other terrestrial bodies. The composition of the lunar core is not well constrained, but most believe that it is composed of metallic iron alloyed with a small amount of sulfur and nickel. Analyses of the Moon's time-variable rotations [!] indicate that the core is at least partly molten.[4]
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