A Revision to the U.S. Southwest Archaeomagnetic Master Curve |
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Authors: | Stacey N Lengyel Jeffrey L Eighmy |
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Institution: | a Department of Anthropology, University of Arizona, Tucson, AZ, 85721-0030, U.S.A.;b Department of Anthropology, Colorado State University, Fort Collins, CO, 80526-1787, U.S.A. |
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Abstract: | Recently, two problems have been recognized with the United States Southwest archaeomagnetic master curve (Eighmy, 1991; LaBelle & Eighmy, 1997; Sternberg, 1989). One of these problems, the damping problem, is inherent to the moving window method of curve construction proposed by Sternberg (1989). The other is due to the fact that the small number of independently dated virtual geomagnetic pole determinations available for the period between
900–1100 are not representative of secular variation during this period. The analyses presented here confirm the existence of these two problems and suggest that they distort the curve by less than 1·0° and between 1·0° and 2·0° respectively. Based on these findings, a new curve is proposed for the U.S. Southwest. |
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Keywords: | ARCHAEOMAGNETISM DAMPING PROBLEM SOUTHWEST CURVE CURVE CONSTRUCTION |
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