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It is nearly 2,000 years older than the Poverty Point site.
Construction of the mounds went on for 500 years until was abandoned about 2800 BCE, probably due to changing environmental conditions.
Their subsequent contact with Europeans had a profound impact on their history of the people.
The prime example is Watson Brake in northern Louisiana, whose 11-mound complex is dated to 3500 BCE, making it the oldest, a dated site in the Americas for such complex construction.
They were the earliest ancestors of the Athabascan- speaking peoples, including the present-day and historical Navajo and Apache.
They constructed large multi-family dwellings in their villages, which were used seasonally.
They divided the archaeological record in the Americas into five phases; The Paleo-Indian or Lithic stage lasted from the first arrival of people in the Americas until about 5000/3000 BCE (in North America).
Three major migrations occurred, as traced by linguistic and genetic data; the early Paleoamericans soon spread throughout the Americas, diversifying into many hundreds of culturally distinct nations and tribes.