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Science 20 July 2007:
Vol. 317. no. 5836, p. 320
DOI: 10.1126/science.1141960
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Technical Comments

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

Gary Haynes,1* David G. Anderson,2 C. Reid Ferring,3 Stuart J. Fiedel,4 Donald K. Grayson,5 C. Vance Haynes, Jr.,6 Vance T. Holliday,6 Bruce B. Huckell,7 Marcel Kornfeld,8 David J. Meltzer,9 Julie Morrow,10 Todd Surovell,8 Nicole M. Waguespack,8 Peter Wigand,12,13,14 Robert M. Yohe, II11

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.

1 Department of Anthropology, University of Nevada, Reno, Reno, NV 89557–0096, USA.
2 Department of Anthropology, University of Tennessee, Knoxville, Knoxville, TN 37996, USA.
3 Department of Geography, University of North Texas, Denton, TX 76203, USA.
4 Louis Berger Group, Richmond, VA 23219–3786, USA.
5 Department of Anthropology, University of Washington, Seattle, WA 98195, USA.
6 Departments of Anthropology and Geosciences, University of Arizona, Tucson, AZ 85721, USA.
7 Maxwell Museum of Anthropology, University of New Mexico, Albuquerque, NM 87131–0001, USA.
8 Department of Anthropology, University of Wyoming, Laramie, WY 82071, USA.
9 Department of Anthropology, Southern Methodist University, Dallas, TX 75205, USA.
10 Arkansas Archeological Survey, State College, AR 72467, USA.
11 Department of Sociology and Anthropology, California State University, Bakersfield, Bakersfield, CA 93311, USA.
12 Department of Geography, University of Nevada, Reno, Reno, NV 89557, USA.
13 Department of Geology, California State University, Bakersfield, CA 93311, USA.
14 Nevada State Museum, Carson City, NV 89701–4004 USA.

* To whom correspondence should be addressed. E-mail: gahaynes{at}unr.edu

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Younger Dryas "black mats" and the Rancholabrean termination in North America.
C. V. Haynes Jr (2008)
PNAS 105, 6520-6525
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