Figure 19
From: RETRACTED ARTICLE: The Hopewell airburst event, 1699–1567 years ago (252–383 CE)
Positive Ir and Pt anomalies from the burned carbon-rich strata on Hopewell archaeological sites in the Ohio River valley: (I) Krasnosky earthworks, Ohio; (J) Junction earthworks, Ohio; (K) Marietta earthworks and mounds, Ohio. Kenneth Barnett Tankersley used Microsoft PowerPoint for Mac Version 16.41 (www.microsoft.com) to create this figure.
