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Redefining the Age of Clovis: Implications for the Peopling of the Americas

Michael R. Waters [email protected] and Thomas W. Stafford, Jr.Authors Info & Affiliations
Science
23 Feb 2007
Vol 315, Issue 5815
pp. 1122-1126
DOI: 10.1126/science.1137166
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Abstract

The Clovis complex is considered to be the oldest unequivocal evidence of humans in the Americas, dating between 11,500 and 10,900 radiocarbon years before the present (14C yr B.P.). Adjusted 14C dates and a reevaluation of the existing Clovis date record revise the Clovis time range to 11,050 to 10,800 14C yr B.P. In as few as 200 calendar years, Clovis technology originated and spread throughout North America. The revised age range for Clovis overlaps non-Clovis sites in North and South America. This and other evidence imply that humans already lived in the Americas before Clovis.
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Supplementary Material

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References and Notes

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Information & Authors

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Published In

Science
Volume 315 | Issue 5815
23 February 2007

Copyright

American Association for the Advancement of Science.

Submission history

Received: 3 November 2006
Accepted: 12 January 2007
Published in print: 23 February 2007

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Notes

Supporting Online Material
www.sciencemag.org/cgi/content/full/315/5815/1122/DC1
Materials and Methods
SOM Text
Table S1
References

Authors

Affiliations

Michael R. Waters* [email protected]
Departments of Anthropology and Geography, Center for the Study of the First Americans, Texas A&M University, 4352 TAMU, College Station, TX 77843-4352, USA.
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Thomas W. Stafford, Jr.
Stafford Research Laboratories, 200 Acadia Avenue, Lafayette, CO 80026, USA.
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Notes

*
To whom correspondence should be addressed. E-mail: [email protected]

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  • Thomas W. Stafford, Jr.
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Redefining the Age of Clovis: Implications for the Peopling of the Americas.Science315,1122-1126(2007).DOI:10.1126/science.1137166

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