Someone I know pointed out to Schoch Davidovits’ geopolymerization model for the ancient Egypt synthesis of stone (faience, as well as the blocks used to construct the Giza pyramids), and he stated that he doesn’t find it compelling. :’)
54 posted on 07/16/2011 5:43:37 PM PDT by SunkenCiv
(Yes, as a matter of fact, it is that time again -- https://secure.freerepublic.com/donate/)