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We present the results of the first archeometric study of some Roman millstones and mortars made of volcanic rocks found at the Libyan archeological sites of Leptis Magna and Cyrene. Two millstones from the first site dating from the III century AD and one from the second, also dating from the II–III centuries AD, were found to made from leucite–phonolite lavas from the quarrying area near Orvieto,...
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