Hunter‐gatherer tradition found in western Alaska and the Aleutian Islands from about 3000 bc down to ad 1800. Characterized by a distinctive core and flake stone industry and an elaborate bone‐working tradition. Most distinctive are the bifacially trimmed projectile points, tanged and untanged knives, and adzes. Among the bone artefacts special note may be made of the finely worked harpoon heads and figurines. The subsistence base was marine mammals and sea fish such as cod and halibut. Houses were elliptical or rectangular in plan, dug about 0.5 m into the ground, roofed with driftwood and sod, and probably entered through an opening in the roof.