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Jenkins, Dennis L.; Davis, Loren G.; Stafford, Thomas W.; Campos, Paula F.; Hockett, Bryan; Jones, George T.; Cummings, Linda Scott; Yost, Chad; Connolly, Thomas J.; Yohe, Robert M.; Gibbons, Summer C.; Raghavan, Maanasa; Rasmussen, Morten; Paijmans, Johanna L. A.; Hofreiter, Michael; Kemp, Brian M.; Barta, Jodi Lynn; Monroe, Cara; Gilbert, M. Thomas P.; Willerslev, Eske
Science (American Association for the Advancement of Science), 07/2012, Letnik: 337, Številka: 6091Journal Article
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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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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