Bannerstones: Ancient Indigenous Stone Carvings, North America (6000–1000 BCE) – The Metropolitan Museum of Art https://www.metmuseum.org/essays/bannerstones-north-america
Bannerstones were made by nomadic hunter-gatherer peoples in the eastern half of North America between 6000 and 1000 BCE during the Archaic period.
Those found in graves at Indian Knoll that are now in the collection of the William
