[math-fun] earth has vast internal water reservoir?

http://www.cbc.ca/news/technology/deep-earth-has-oceans-worth-of-water-10-di...

From tiny observations follow huge conclusions: Somebody found a diamond containing a mineral inclusion, said mineral 1.5% water. This"proves" there is a tremendous amount of water in Earth mantle diamond forming region, from which we extrapolate this region contains way more water than all oceans. This in turn suggests a geologic water cycle where ocean water subducted into the mantle, and outgassed from same... this is rather revolutionary change in view...

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