Ah, Virginia appears to have one of the few pre-Clovis sites in the Americas, Cactus Hill a bit south of Richmond.
I'm not finding any good online sources though, just scattered mentions. From about.com:
Cactus Hill is a buried multicomponent site on the coastal plain of the Nottaway River in Sussex County, Virginia. The site has Archaic and Clovis occupations, but most importantly, below the Clovis and separated by sterile sand, is an apparent Pre-Clovis occupation.
Radiocarbon dates on wood from the preclovis level range between 15,070±70 and 18,250±80 RCYBP, calibrated to ca. 18,200-22,000 years ago. Luminescence dates taken on feldspar and quartzite grains in the various levels of the site agree, almost entirely, with the radiocarbon assays. The luminescence dates suggest that the site stratigraphy is primarily intact and has been little affected by movement of artifacts down through the sterile sand; but some doubt must remain. With the continuing discovery of additional preclovis sites in North and South America, however, these issues seem less compelling.
The site gets mentioned in Redefining the Age of Clovis: Implications for the Peopling of the Americas, Michael R. Waters and Thomas W. Stafford Jr., Science 2007 and The Late Pleistocene Dispersal of Modern Humans in the Americas, Ted Goebel, Michael R. Waters, Dennis H. O’Rourke, Science 2008. The abstract of the 2nd paper is
When did humans colonize the Americas? From where did they come and what routes did they take? These questions have gripped scientists for decades, but until recently answers have proven difficult to find. Current genetic evidence implies dispersal from a single Siberian population toward the Bering Land Bridge no earlier than about 30,000 years ago (and possibly after 22,000 years ago), then migration from Beringia to the Americas sometime after 16,500 years ago. The archaeological records of Siberia and Beringia generally support these findings, as do archaeological sites in North and South America dating to as early as 15,000 years ago. If this is the time of colonization, geological data from western Canada suggest that humans dispersed along the recently deglaciated Pacific coastline.
The most recent pre-Clovis site to get attention (see the NYT), back in March due to a paper in Science, is Buttermilk Creek in Texas.
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