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The Topper excavation site is on the bank of the Savannah River on property owned by Clariant Corp., a chemical corporation headquartered near Basel, Switzerland.
He recovered numerous stone tool artifacts in soils that were later dated by an outside team of geologists to be 16,000 years old.
May 2000 — Geology study done by consultants; ice age soil confirmed for pre-Clovis artifacts.
May 2001 — Geologists revisit Topper and obtain ancient plant remains deep down in the Pleistocene terrace.
He is a member of the Society for American Archaeology, the Southeastern Archaeological Conference, the Archaeological Society of South Carolina, and the Florida Anthropological Society.
In October 2005, archaeologists will meet in Columbia for a conference on Clovis and the study of earliest Americans.Then on the last day of the last week of digging, Goodyear's team uncovered a black stain in the soil where artifacts lay, providing him the charcoal needed for radiocarbon dating. Tom Stafford of Stafford Laboratories in Boulder, Colo., came to Topper and collected charcoal samples for dating."Three radiocarbon dates were obtained from deep in the terrace at Topper with two dates of 50,300 and 51,700 on burnt plant remains.The findings are significant because they suggest that humans inhabited North America well before the last ice age more than 20,000 years ago, a potentially explosive revelation in American archaeology.Goodyear, who has garnered international attention for his discoveries of tools that pre-date what is believed to be humans' arrival in North America, announced the test results, which were done by the University of California at Irvine Laboratory, Wednesday (Nov .17).