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Clovis Age Western Stemmed Projectile Points and Human Coprolites at the Paisley Caves

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  • The Paisley Caves in Oregon record the oldest directly dated human remains (DNA) in the Western Hemisphere. More than 100 high-precision radiocarbon dates show that deposits containing artifacts and coprolites ranging in age from 12,450 to 2295 ¹⁴C years ago are well stratified. Western Stemmed projectile points were recovered in deposits dated to 11,070 to 11,340 ¹⁴C years ago, a time contemporaneous with or preceding the Clovis technology. There is no evidence of diagnostic Clovis technology at the site. These two distinct technologies were parallel developments, not the product of a unilinear technological evolution. “Blind testing” analysis of coprolites by an independent laboratory confirms the presence of human DNA in specimens of pre-Clovis age. The colonization of the Americas involved multiple technologically divergent, and possibly genetically divergent, founding groups.
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  • Jenkins, D. L., Davis, L. G., Stafford, J., Thomas W, Campos, P. F., Hockett, B., Jones, G. T., . . . . (2012). Clovis age western stemmed projectile points and human coprolites at the paisley caves. Science (New York, N.Y.), 337(6091), 223-228. doi: 10.1126/science.1218443
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  • 337
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  • 6091
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  • Support for the Paisley Caves Project was provided by NSF grant 0924606; the Danish National Research Foundation; the U.S. Bureau of Land Management; the archaeological field school and the Museum of Natural and Cultural History, University of Oregon; the Keystone Archaeological Research Fund, Oregon State University; the Bernice Peltier Huber Charitable Trust; the Great Basin Paleoindian Research Unit of the University of Nevada, Reno; Playa Fellowship Residency grants; and D. Dana, A. Hurley, S. Kohntopp, R. Engle, Origer Associates Inc., and other private contributors.
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