information:extraction, structural:scholar_edition
Lower Jackson and Motley mounds

Approximately 1.8 miles (2.9 km) south of the Poverty Point site center is the Lower Jackson Mound (16WC10) a conical structure 10 ft (3 m) in height and 115 ft (35 m) in diameter at its base. For many years, archaeologists believed the Lower Jackson Mound was built during the same time as the Poverty Point site. However, modern radiocarbon dates from the base of the Mound demonstrate that the Lower Jackson Mound was built ca. 3900 to 3600 BC which predates the Poverty Point earthworks by about 1500 years. Artifacts typical of the early date, such as baked loess blocks and Evans projectile points, were recovered near the mound. Lower Jackson Mound is on the same north-south line as the later Poverty Point Mounds E, A, and B.