From:
Tomas Lipps <tmlipps@zzzzzzzzzzzzz>
Date:
Fri, 17 Feb 2006 12:43:59 -0700
Subject:
porphyry
no geologist I, but slide #1 looks a lot like porphyry, the others
more probably conglomerate?
maybe an actual geologist could tell us. I'll send that to a geologist friend.
see:
http://www.eeescience.utoledo.edu/Faculty/Harrell/Egypt/Quarries/Hardst_Quar.html
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