Final answer:
The Monte Verde site in Chile is one archaeological site with pre-Clovis dates, featuring artifacts dated as early as 16,000 BP, which include hearths, tools, and human footprints, alongside evidence of a plant-based Paleo-Indian diet.
Step-by-step explanation:
One archaeological site with pre-Clovis dates is the Monte Verde site in Chile. The evidences found at Monte Verde, such as hearths, wooden and stone tools, and human footprints, have been dated as early as 16,000 BP, which predates the Clovis culture traditionally thought to represent the first human presence in the Americas. Additional finds include clay-lined fire pits and evidence of plant-based diet from Paleo-Indians, supported by the discovery of coprolites.
The Debra L. Friedkin Site in Texas has a pre-Clovis sequence dating between 13,500 to 15,500 BP. Tools recovered from this site include partially flaked tools, blades, and scrapers. Meanwhile, the Cactus Hill Site in Virginia provides evidence that includes pre-Clovis projectile points potentially dating from 18,000-22,000 BP.
Monte Verde's significance lies in its challenge to the Clovis First hypothesis, which postulated that no human presence in the Americas predated the Clovis culture, dated around 10,000 BCE. The discoveries at Monte Verde, along with other similar sites, support a pre-Clovis human occupation and thus suggest a more complex pattern of early human migration into the Americas.