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  2. Mississippian copper plates - Wikipedia

    en.wikipedia.org/wiki/Mississippian_copper_plates

    Unworked copper nugget. The native copper, as well as the technique of cold working it, is believed to have come from the Great Lakes area, hundreds of miles to the north of the Cahokia polity and most other Mississippian culture sites, although the copper workshops discovered near Mound 34 at Cahokia are so far the only copper workshops found at a Mississippian culture archaeological site. [5]

  3. Wulfing cache - Wikipedia

    en.wikipedia.org/wiki/Wulfing_cache

    The Wulfing cache, or Malden plates, are eight Mississippian copper plates crafted by peoples of the Mississippian culture. They were discovered in Dunklin County, Missouri in 1906 by Ray Grooms, a farmer, while plowing a field south of Malden. [1] The repousséd copper plates were instrumental to archaeologists' developing the concept known as ...

  4. Metallurgy in pre-Columbian America - Wikipedia

    en.wikipedia.org/wiki/Metallurgy_in_pre...

    Sican tumi, or ceremonial knife, Peru, 850–1500 CE. Metallurgy in pre-Columbian America is the extraction, purification and alloying of metals and metal crafting by Indigenous peoples of the Americas prior to European contact in the late 15th century. Indigenous Americans had been using native metals from ancient times, with recent finds of ...

  5. Art and engraving on United States banknotes - Wikipedia

    en.wikipedia.org/wiki/Art_and_engraving_on...

    Art and engraving on United States banknotes. In early 18th century Colonial America, engravers began experimenting with copper plates as an alternative medium to wood. Applied to the production of paper currency, copper-plate engraving allowed for greater detail and production during printing. It was the transition to steel engraving that ...

  6. Etowah plates - Wikipedia

    en.wikipedia.org/wiki/Etowah_plates

    Rogan Plate 1, falcon dancer plate found at Etowah, but believed to be fabricated at Cahokia in the 13th century. The Etowah plates, including the Rogan Plates, are a collection of Mississippian copper plates discovered in Mound C at the Etowah Indian Mounds near Cartersville, Georgia. Many of the plates display iconography that archaeologists ...

  7. Old Copper complex - Wikipedia

    en.wikipedia.org/wiki/Old_Copper_complex

    The Copper Culture State Park, in Oconto, northeastern Wisconsin, contains an ancient burial ground used by the Old Copper complex culture between 5,000 and 6,000 years ago. It was rediscovered in June 1952 by a 13-year-old boy who unearthed human bones while playing in an old quarry. By July the first archaeological dig was started by the ...

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