Examination of a multi-component caribou crossing site on the Thelon River, Keewatin District reveals a series of sequential occupations by different cultural and linguistic groups consisting of Algonkian-speakers (Shield Archaic tradition), followed by Eskimo-speakers (Arctic Small Tool tradition), followed by Athabascan-speakers (Taltheilei Shale tradition), followed by Eskimo-speakers (historic Caribou Eskimos).