January 22, 2011 12:21AM
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Registered: 19 years ago
Posts: 5,522
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Very interesting paper with references [
www.migration-diffusion.info]
Recent scientific literature has come to the conclusion that the major source of the copper that swept through the European Bronze Age after 2500 BC is unknown. However, these studies claim that the 10 tons of copper oxhide ingots recovered from the late Bronze Age (1300 BC) Uluburun shipwreck off the coast of Turkey was "extraordinarily pure" (more than 99.5% pure), and that it was not the product of smelting from ore. The oxhides are all brittle "blister copper" , with voids, slag bits, and oxides, created when the oxhides were made in multiple pourings outdoors over wood fires. Only Michigan Copper is of this purity, and it is known to have been mined in enormous quantities during the Bronze Age.
This PDF file has some strange format that makes copying very difficult. It took a lot of 'fiddling' just to get a clickable link. Even so it is well worth reading.
"The Stone Age did not end for lack of stone, and the Oil Age will end long before the world runs out of oil"
-- Sheikh Zaki Yamani
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