Associated with Vergennes Phase of Laurentian Tradition. Ground slate technology adoption. Widespread across interior Northeast. Part of comprehensive Maine chronology: Paleo-Indian 12,000-10,000 BP → Early Archaic 10,000-8,000 BP → Middle Archaic 8,000-6,000 BP → Late Archaic 6,000-3,000 BP → Early Woodland 3,000-2,000 BP.
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