Clemson Island Prehistoric District - Credit: Wikimedia Commons
Clemson Island Prehistoric District is a historic archaeological site and national historic district located at Halifax Township, Dauphin County, Pennsylvania. It is a series of three spatially discrete loci. They constitute a transitional Middle Woodland - Late Woodland (c. 900-1100 A.D.) earthwork mound and associated village. There is evidence of occupation from the Early Archaic period (c. 6,900 B.C.) to the 18th century. The mound was excavated in May and June 1929. Note: This includes Read more on Wikipedia
Source: en.wikipedia.org