Museum of Natural and Cultural History, University of Oregon, Eugene, OR 97403, USA.
Science. 2012 Jul 13;337(6091):223-8. doi: 10.1126/science.1218443.
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 (14)C years ago are well stratified. Western Stemmed projectile points were recovered in deposits dated to 11,070 to 11,340 (14)C 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.
俄勒冈州的佩斯利洞穴记录了西半球最古老的有直接日期的人类遗骸（DNA）。100 多个高精度放射性碳测年显示，含有文物和粪化石的沉积物年代从 12450 到 2295（14）C 年前不等，地层很好。在年代为 11070 到 11340（14）C 年前的沉积物中发现了西部茎状投射器点，这一时间与克洛维斯技术同期或早于克洛维斯技术。该遗址没有克洛维斯技术的诊断证据。这两种截然不同的技术是平行发展的，不是线性技术进化的产物。独立实验室对粪化石进行的“盲测”分析证实了在旧石器时代之前的标本中存在人类 DNA。美洲的殖民化涉及到多个技术上不同的、可能在基因上也不同的创始群体。
