ASTt: This Arctic Small Tool tradition (Independence II culture) tent ring is referred to as a "mid-passage" house. The outer ring of rocks would have weighed down the edges of a tent made of caribou or seal skins. The "mid-passage" is formed by the parallel lines of rocks dividing the interior of the house; at the center of the mid-passage there is a small hearth or fireplace in which Arctic willow twigs or driftwood would have been burned.