According to this press release, a team working on Santa Rosa and San Miguel Islands, off the coast of California, have found artifacts dating to the Terminal Pleistocene, ca. 12,200 – 11,400 B.P. (Before Present). They’re saying the stone tools are highly sophisticated, and display excellent workmanship. The photo of the crescent certainly bears that out.
When I was a student at CSU Fullerton I got a chance to participate in an excavation on San Nicolas, and ever since then I’ve tried to pay attention to work being done on all of the Channel Islands.
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