Duncan Island is a prehistoric archaeological site located in the Susquehanna River at Martic Township in Lancaster County, Pennsylvania. The islet, which has an elevation of 52 meters, sits within the river and serves as a significant location for archaeological study.
The site underwent study in the 1950s and 1970s. During these periods of research, artifacts were uncovered that have been dated to the Archaic period, spanning from approximately 8000 B.C. to 1000 A.D.
Due to its historical and archaeological significance, Duncan Island was listed on the National Register of Historic Places in 1984. The site remains a recognized point of prehistoric heritage in Pennsylvania.
Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons
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