An Eskimo subculture that settled in northern Alaska and northeast Siberia between 1500-2000 years ago, and is best known for its ivory objects. The earliest sites were in Bering Strait area and the major type site is on St. Lawrence Island. It is an early manifestation of the western Arctic Thule tradition, often linked with the possibly contemporaneous Okvik culture. Although both share similar traits - a highly evolved art style, polished slate tools and pottery - the relationship between the two is still uncertain. The art style appears to have flourished between 100-500 AD.