BIRD-STONE: A class of prehistoric stone objects of undetermined purpose, usually resembling or shaped like a bird; carved bird effigies. These polished stone weights occurred in the cultures of the Archaic tradition (8000–1000 bc) and later cultures in the eastern woodlands of North America. They were probably attached to throwing sticks or atlatls to add weight and leverage. [bannerstone, bird-stone, boatstone]
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