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Majorville Medicine Wheel 10637A
The Majorville Medicine Wheel archaeological site is located in southern Alberta, Canada.  The "medicine wheel" consists of a large central stone cairn with 28 spokes radiating outward to an outer ring, all marked with smaller stones.  A portion of the central cairn was excavated in 1971, and artifacts found at the base of the structure dated the start of its construction to some 5,000 years before present, which may pre-date Stonehenge.