The article Theolonius put a link to mentions testing the Darly Dale sedimentary rock (which I believe castle Hill is made of). Some thinking in the article is that the vitrification wasn't to do with the rock itself, but more to do with the 'mortar' used between stones becoming vitrified. Not sure I was aware of any evidence of the stones being mortared into place, but you never now.
Reply | with quote | Posted by Monganaut 11th June 2018ce 22:29 |
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