| The term is also applied to American civilizations that already used copper and copper alloys thousands of years before the European conquest. Besides the cultures from the Andes and Mesoamerica, the Old Copper Complex, located in present-day Michigan and Wisconsin in the United States, used copper for tools, weapons, and other implements. However, no evidence for copper smelting or alloying has been found here and objects were hammered into shape. Artifacts from these sites have been dated from 4000 to 1000 BC, making them some of the oldest Chalcolithic sites in the entire world.[13] |
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