Shawnee, Powhatan, Waco, Tawakoni, Tonkawa, Karankawa, Quapaw, and Mosopelea are usually seen as marginally southeastern and their traditional lands represent the borders of the cultural region.
Belonging in the Lithic stage, the oldest known art in the Americas is the Vero Beach bone found in present-day Florida.
[30] Many objects excavated at Poverty Point sites were made of materials that originated in distant places, indicating that the people were part of an extensive trading culture.
Stone tools found at Poverty Point were made from raw materials that can be traced to the relatively nearby Ouachita and Ozark mountains, as well as others from the more distant Ohio and Tennessee River valleys.
[31] Hand-modeled lowly fired clay objects occur in a variety of shapes including anthropomorphic figurines and cooking balls.
With social upsets and diseases unknowingly introduced by Europeans many of the societies collapsed and ceased to practice a Mississippian lifestyle, with an exception being the Natchez people of Mississippi and Louisiana.
Other tribes descended from Mississippian cultures include the Alabama, Biloxi, Caddo, Choctaw, Muscogee Creek, Tunica, and many other southeastern peoples.
[33] Some members of the tribes chose to stay in their homelands and accept state and US citizenship; others simply hid in the mountains or swamps and sought to maintain some cultural continuity.
Social traits included having a matrilineal kinship system, exogamous marriage between clans, and organizing into settled villages and towns.
Many of the religious beliefs of the Southeastern Ceremonial Complex or the Southern Cult, were also shared by the Northeastern Woodlands tribes, probably spread through the dominance of the Mississippian culture in the 10th century.