Technical Comments

Comment on "Redefining the Age of Clovis: Implications for the Peopling of the Americas"

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Science  20 Jul 2007:
Vol. 317, Issue 5836, pp. 320
DOI: 10.1126/science.1141960

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Waters and Stafford (Reports, 23 February 2007, p. 1122) provided useful information about the age of some Clovis sites but have not definitively established the temporal span of this cultural complex in the Americas. Only a continuing program of radiometric dating and careful stratigraphic correlations can address the lingering ambiguity about the emergence and spread of Clovis culture.

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