 The mounds and the artifacts contained within them indicate contact with the Adena and Hopewell of the Ohio River valley.It is unknown if the contact was direct or indirect.The first mound-builders in what is now the Kay-Nah-Chi-Wah-Nung National Historic Site of Canada, Laurel culture (c.2300 BP - 900 BP) who lived "in villages and built large round burial mounds along the edge of the river, as monuments to their dead."