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      Arizona Radiocarbon Dates Ix: Carbon Isotope Dating of Packrat Middens

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      Radiocarbon
      Cambridge University Press (CUP)

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          Abstract

          The carbon isotope analyses reported here include all radiocarbon dates run on packrat middens in the United States and Mexico by the Arizona radiocarbon laboratory through October 1977. All samples described below report dates by CO 2 (0.5 or 2.0L) counting. Age calculations are based on a 14C half-life of 5568 years, using 0.949 NBS oxalic acid as the modern value. Errors, based on counting statistics, are quoted to ± 1δ; infinite ages quoted to — 2δ.

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          Macrofossil Analysis of wood rat (Neotoma) Middens as a Key to the Quaternary Vegetational History of Arid America

          Wood rat (Neotoma) deposits preserved in dry rock shelters have radiocarbon ages extending from close to the present to >40,000 BP, thus providing elaborate samples of changing vegetation during the climatic shifts of the late Pleistocene and Holocene. The established record extends geographically from Oregon and Wyoming (at 45°N) south to Baja California, Sonora, and to Tehuacan (at 18°N) in southern Mexico. Several hundred ancient middens have been uncovered, and over 130 have been radiocarbon-dated.
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            Natural History of the Desert Woodrat, Neotoma lepida

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              Author and article information

              Journal
              applab
              Radiocarbon
              Radiocarbon
              Cambridge University Press (CUP)
              0033-8222
              1945-5755
              1978
              July 18 2016
              1978
              : 20
              : 02
              : 171-191
              Article
              10.1017/S0033822200004045
              afe377d8-5f97-4d0b-ab90-c4bc50f6781e
              © 1978
              History

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