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used clinker grinding north america in indonesia

Nov 24, 1998· From ≈11,200 to 8,000 years ago, the Great Plains ofNorth Americawere populated by small Paleoindian hunting groups with well developed weaponry and the expertise to successfully hunt large mammals, especially mammoths and bison. Mammoths became extinct on the Plains by 11,000 years ago, and, although paleoecological conditions were worsening, their demise may have been …

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