Analysis of spear- and dart points indicated that Native peoples occupied Rosenberger most intensively throughout much of the Late Archaic period. McWhinney, Merom-Trimble, and Brewerton examples were the most common spear points recovered.
Investigators documented just over 400 features at Rosenberger. They consisted of hearths, artifact caches, large and small circular trash pits, and burials. The large number indicated that Late Archaic groups repeatedly occupied the site on a seasonal basis.
Investigators also identified spatial differences in feature distribution. Burials tended to cluster near the center. Large circular pits were concentrated to the south, and other types of features were concentrated to the north. These patterns indicated that Native residents restricted particular activities to certain areas of the settlement.
The site’s Ohio River floodplain location provided direct access to diverse natural resources. Archaeologists determined that fish were an important dietary component, because fish remains accounted for about 15 percent of the identified animal bones from the site. Site residents also harvested river mussels, but in much smaller quantities.
Resources from the adjacent floodplain included reptiles (mostly turtles) and small mammals. These resources supplemented the deer and other small mammals site residents hunted in the uplands.