Earthwork and mound complex dating to the Middle Woodland period (c.200 BC–AD 400) and situated in the Scioto River valley, Ross County, Ohio (USA). When first discovered in 1848, the site consisted of a large square earthwork enclosing that contained at least 24 earthen mounds. Excavation of several of the mounds in the 1920s revealed a variety of Hopewell mortuary features, including the Great Mica Grave found in Mound 13. Many of the mortuary features contained Hopewell-series pottery and exotic artifacts, such as animal-effigy and plain-platform pipes, obsidian projectile points, copper effigies of animals and humans, plates, beads, axes and marine-shell cups.