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University of Texas at Austin Radiocarbon Dates VI

  • S. Valastro (a1), E. Mott Davis (a1) and Craig T. Rightmire (a1)
Extract

This laboratory is now a part of the Bureau of Economic Geology, The University of Texas at Austin. The present list reports C14 measurements made in dating projects completed in the year ending November, 1967, and some measurements for projects still in progress. Age calculations are based on C14 half-life of 5568 yr and a modern standard of 95% of NBS oxalic acid. The deviations reported are based on the counting statistics of the sample, background, and modern, and are ± 1σ except that when the sample count approaches either the modern or the background, 2σ limits are reported. The laboratory continues to use liquid scintillation counting of benzene, using Li2C2 and vanadium activated catalyst in preparation, as described in Texas IV and earlier lists. Chemical yields now average 85%.

Rightmire's caliche dating (done for an M.A. thesis in the Dept. of Geol.) is the principal project reported in this list; in addition to the research he prepared the samples in our laboratory and wrote the statements which accompany the list. Valastro is in charge of all technical operations in the laboratory, and he and Davis share the administrative responsibilities. Davis, who handles sample screening (with the aid of an Advisory Committee) and archaeological appraisal, compiled the list.

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References
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Date lists:
Michigan I Crane, , 1956
Texas III Pearson, et al., 1965
Texas IV Pearson, et al., 1966
Texas V Valastro, et al., 1967
USGS V Rubin, and Alexander, , 1960
Crane, H. R., 1956, University of Michigan radiocarbon dates I: Science, v. 124, p. 664672.
Fulton, R. L. and Webb, C. H., 1953, The Bellevue Mound: Texas Archeol. Soc. Bull., v. 24, p. 1824.
Ingerson, Earl, and Pearson, F. J. Jr., 1964, Estimation of age and rate of motion of ground water by the carbon-14 method, in: Koyama, Tadashiro (ed.), Mazuren, Toyko, Recent researches in the fields of hydrosphere, atmosphere, and nuclear geochemistry, p. 263283.
John, LeRoy Jr., 1964, The Devil's Mouth site: Dept. of Anthropol., Univ. of Texas, Archaeol. Ser. no. 6.
Johnson, I. W. and Franco, J. L., 1967, Un huipilli precolombino de Chilapa, Guerrero: Revista Mexicana de Estudios Antropologicos, v. 21, p. 149189.
Lehmer, D. J., 1948, The Jornada Branch of the Mogollon: Univ. of Arizona Bull. no. 17.
Libby, W. F., 1955: Radiocarbon Dating, 2nd ed., Chicago, Ill., Univ. Chicago Press.
Pearson, F. J. Jr., Davis, E. M., and Tamers, M. A., 1966, University of Texas radiocarbon dates IV: Radiocarbon, v. 8, p. 453466.
Pearson, F. J. Jr., Davis, E. M., Tamers, M. A., and Johnstone, R. W., 1965, University of Texas radiocarbon dates III: Radiocarbon, v. 7, p. 296314.
Rubin, Meyer and Alexander, Corrinne, 1960, U. S. Geological Survey radiocarbon dates V: Am. Jour. Sci. Radiocarbon Suppl., v. 2, p. 129185.
Valastro, S. Jr., Pearson, F. J., and Davis, E. M., 1967, University of Texas Radiocarbon Dates V: Radiocarbon, v. 9, p. 439453.
Webb, C. H., 1959, The Belcher Mound: Soc. Am. Archaeol., Mem., no. 16.
Williams, Howel, 1942, The geology of Crater Lake National Park, Oregon: Carnegie Inst. Washington Pub. 540, p. 162.
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Radiocarbon
  • ISSN: 0033-8222
  • EISSN: 1945-5755
  • URL: /core/journals/radiocarbon
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