Science dating show

28-Dec-2019 21:49

"When I first saw that the lower archaeological layer contained radiocarbon ages older than 14,000 years, I was stunned but skeptical and needed to see those numbers repeated over and over just to be sure they're right.

So we ran more radiocarbon dates, and the lower layer consistently dated between 14,000-16,000 years old." The dates from the oldest artifacts challenge the long-held "Clovis First" theory of early migration to the Americas, which suggested that people crossed from Siberia into North America and traveled down through an opening in the ice sheet near the present-day Dakotas.

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"This evidence leads us to conclude that early peoples moved south of continental ice sheets along the Pacific coast." Davis's team also found tooth fragments from an extinct form of horse known to have lived in North America at the end of the last glacial period.

These tooth fragments, along with the radiocarbon dating, show that Cooper's Ferry is the oldest radiocarbon-dated site in North America that includes artifacts associated with the bones of extinct animals, Davis said.

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"Essentially, the Columbia River corridor was the first off-ramp of a Pacific coast migration route. After joining the Oregon State faculty, he partnered with the BLM to establish a summer archaeological field school there, bringing undergraduate and graduate students from Oregon State and elsewhere for eight weeks each summer from 2009 to 2018 to help with the research.

"The timing and position of the Cooper's Ferry site is consistent with and most easily explained as the result of an early Pacific coastal migration." Cooper's Ferry, located at the confluence of Rock Creek and the lower Salmon River, is known by the Nez Perce Tribe as an ancient village site named Nipéhe. The site includes two dig areas; the published findings are about artifacts found in area A.

He is also awaiting carbon-dating information from artifacts from a second dig location at the Cooper's Ferry site.

"We have 10 years' worth of excavated artifacts and samples to analyze," Davis said.

Devices harnessing quantum effects will underpin security in the future. The natural aptitudes that make gamers and cyber professionals good at their jobs are incredibly similar."Essentially, the Columbia River corridor was the first off-ramp of a Pacific coast migration route. After joining the Oregon State faculty, he partnered with the BLM to establish a summer archaeological field school there, bringing undergraduate and graduate students from Oregon State and elsewhere for eight weeks each summer from 2009 to 2018 to help with the research."The timing and position of the Cooper's Ferry site is consistent with and most easily explained as the result of an early Pacific coastal migration." Cooper's Ferry, located at the confluence of Rock Creek and the lower Salmon River, is known by the Nez Perce Tribe as an ancient village site named Nipéhe. The site includes two dig areas; the published findings are about artifacts found in area A.He is also awaiting carbon-dating information from artifacts from a second dig location at the Cooper's Ferry site."We have 10 years' worth of excavated artifacts and samples to analyze," Davis said.The ice-free corridor is hypothesized to have opened as early as 14,800 years ago, well after the date of the oldest artifacts found at Cooper's Ferry, Davis said.