[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... -- Warren D. Smith How can people get so excited over a tiny crumb of ringwoodite? Here in California we have wonderbreadite <http://gosper.org/pennyloafer.JPG> . --rwg