Ozier Mound, a Middle Woodland mound dating from 100 B.C. to 100 A.D., has a base measuring 240 feet by 230 feet and rises 33 feet tall, making it the second largest mound at the site. In 1981, a mechanical core auger determined that it was built in at least six stages. Archaeological excavations on its large, flat summit sought evidence of ceremonial structures from the mound’s final stages, but although investigators found a number of cultural features, they found no indication of a structure. Wood charcoal recovered from these features was radiocarbon dated to A.D. 100, nearly identical to dates obtained at the base of the Twin Mounds about 600 feet south of Ozier. It is possible that rituals or ceremonies took place atop Ozier Mound during the burial of important individuals at the base of the Twin Mounds.