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Clovis People Not First Americans, Study Shows
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Bianca
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Clovis People Not First Americans, Study Shows
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on:
February 28, 2009, 07:11:40 am »
Clovis People Not First Americans, Study Shows
Distinctive spearpoints made by the so-called Clovis culture have been found at sites throughout the contiguous United States, as well as in Mexico and Central America.
New radiocarbon dating of spearpoints from all known Clovis sites has significantly shortened the time frame in which Clovis people could have spread to South America, suggesting the culture could not have been the first humans to arrive in the New World.
Photograph courtesy
the Center for the Study of the First Americans,
Texas A&M University/ Science
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Last Edit: February 28, 2009, 07:13:31 am by Bianca
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Bianca
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Re: Clovis People Not First Americans, Study Shows
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February 28, 2009, 07:15:58 am »
Clovis People Not First Americans, Study Shows
Stefan Lovgren
for National Geographic News
February 23, 2007
The so-called Clovis people, known for their distinctive spearheads, were not the first humans to set foot in the Americas after all, a new study says.
The find supports growing archaeological evidence found in recent years that disputes the notion that the Americas were originally populated by a single migration of people from Asia about 13,000 years ago.
New radiocarbon dating of Clovis-culture materials shows that this group inhabited the Americas a little later and for a shorter period of time than previously believed.
Archaeological evidence of human occupation in South America also dates to the same time as the Clovis-culture materials. This suggests that people were living in the Americas before the Clovis people arrived.
"I look at it as the final nail in the 'Clovis first' coffin," said Michael Waters, director of the Center for the Study of the First Americans at Texas A&M University.
Waters is a co-author of the new study, which appears in today's issue of the journal Science.
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Bianca
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Re: Clovis People Not First Americans, Study Shows
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February 28, 2009, 07:17:04 am »
South America
The Clovis culture was named after flint spearheads found in the 1930s at a site in Clovis, New Mexico.
Clovis sites have been identified throughout the contiguous United States, as well as in Mexico and Central America.
The Clovis, widely believed to have been mammoth hunters, likely arrived via the Bering land bridge that once linked Asia and Alaska. They then spread rapidly southward.
Radiocarbon dating had previously shown the Clovis period to range from 11,500 to 10,900 radiocarbon years ago (about 13,300 to 12,800 calendar years ago), giving the culture several hundred years to reach South America.
Radiocarbon years and calendar years don't always match, because the atmospheric abundance of carbon 14—which is absorbed by all living things and on which radiocarbon dating is based—has varied over time.
For their study, the researchers reevaluated materials from all known Clovis sites.
The data the researchers collected narrowed the Clovis time frame to between 11,050 and 10,800 radiocarbon years ago. This translates to roughly 13,100 to 12,900 calendar years ago—a duration of 200 years.
A number of archaeological sites in South America have yielded the same dates.
"The Clovis-first model says it would have taken anywhere from 700 to 1,000 years for people to reach the southern tip of South America," Waters said. "It seems highly unlikely that the Clovis people could have flown down there in 200 years.
"This indicates pretty strongly that there were people living in both hemispheres at the same time."
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Last Edit: February 28, 2009, 07:18:47 am by Bianca
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Re: Clovis People Not First Americans, Study Shows
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February 28, 2009, 07:20:04 am »
Pre-Clovis People
But if humans lived in the Americas before the Clovis arrived, who were these other people and where did they come from?
"I think we're moving toward understanding that the peopling of the Americas was not a singular event like the Clovis-first model would have us believe," Waters said.
Instead it "was a process with people probably arriving at different times and taking different routes and potentially coming from different places."
(Related photos: the search for the first Americans.)
John Johnson is an archaeologist and ethnohistorian at the Santa Barbara Museum of Natural History in California.
He said the new study and other archaeological research suggest that there were people in place from coast to coast prior to what is known as the Clovis horizon.
"It implies that people here adapted the Clovis technology [of spearpoints], that people didn't arrive full-blown with this technology," he said.
Tom Dillehay, the chair of the anthropology department at Tennessee's Vanderbilt University, suggested that it's time to lay the Clovis-first model to rest.
"Now we can perhaps begin to ask new kinds of research questions," Dillehay said, "about the timing of this existing population, about migrations and movements, and what's going on in North versus South America."
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