Thule culture chronology
The Thule culture is the latest of the so-called Neo-Eskimo cultures. Developed around 1000 AD in North Alaska it spread eastwards along the Arctic shores of North America to Labrador and Greenland, which was reached approximately 1200 AD.
From the 15th century Thule culture sites were found throughout the eastern Arctic region. After that time, the culture was absent in the High Arctic and concentrated at lower latitudes. Recent migration from Canada into the Avanersuaq (Thule) area in northwestern Greenland began in the 18th century.