Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-20T06:23:04.288Z Has data issue: false hasContentIssue false
  • English
  • Français

University of Pennsylvania Radiocarbon Dates XII

Published online by Cambridge University Press:  18 July 2016

Elizabeth K. Ralph  and
Henry N. Michael
Elizabeth K. Ralph
Affiliation:
Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104
Henry N. Michael
Affiliation:
Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

This list is a continuation of Univ. of Pennsylvania Dates VII (Radiocarbon, 1965, v. 7, p. 179-186). It includes results for samples of Sequoia gigantea and for Pinus aristata, most of which were tree-ring dated at the Lab. of Tree-Ring Research, Univ. of Arizona.

All sequoia and bristlecone pine samples have been corrected for deviations in C13/C12 ratios. The δC13 values listed represent the deviations (multiplied by 2) of the samples measured from the δC13 value of our 100-yr old standard oak sample which is also the reference value (adjusted for zero age) for the calculation of δC14. In our previous publication (Radiocarbon, 1965, v. 7, p. 179-186), δC13 values were erroneously reported as negative deviations from our oak standard. For the calculation of the Δ's, however, they were used in the correct sense. This mistake has been corrected in this list and one notes that the sequoias and bristlecone pines tend to be enriched slightly in C13 as compared with the oak standard.

Type
Research Article
Information
Radiocarbon , Volume 11 , Issue 2 , 1969 , pp. 469 - 481
Copyright
Copyright © The American Journal of Science 

References

Date lists: Google Scholar
Arizona IV Damon, , Long, , and Sigalove, , 1963 Google Scholar
Pennsylvania VII Ralph, , Michael, , and Gruninger, , 1965 Google Scholar
Bucha, Vaclav, 1967, Intensity of the earth's magnetic field during archaeological times in Czechoslovakia: Archaeometry, v. 10, p. 12–22.CrossRefGoogle Scholar
Bonhommet, Norbert and Babkine, Jean, 1967, Sur la présence d'aimantations inversées dans la Chaîne des Puys; Acad. sci. [Paris], Comptes rendus, 264, sér. B, p. 92–94.Google Scholar
Crevecoeur, E., 1966, Détermination de la constance du rayonnement cosmique et des âges terrestres et cosmiques des metéorites ferreuses par la radioactivité de l'aluminium 26 et du beryllium 10: Acad. royale Bélgique Bull. cl. sci., v. 52, p. 261–275.Google Scholar
Damon, P. E., Long, Austin, and Sigalove, J. J., 1963, Arizona radiocarbon dates IV: Radiocarbon, v. 5, p. 283–301.CrossRefGoogle Scholar
Douglass, A. E., 1919, Climatic cycles and tree growth: A study of the annual rings of trees in relation to climatic and solar activity: Carnegie Inst. of Washington publ. 289, v. 1, p. 44–53.Google Scholar
Douglass, A. E. 1936, Climatic cycles and tree growth, v. III: A study of cycles: Carnegie Inst. of Washington publ. 289, v. 3, p. 3, 99-105.Google Scholar
Douglass, A. E. 1945, Survey of sequoia studies: Tree-Ring Bull., v. 11, p. 26–32.Google Scholar
Douglass, A. E. 1949, A superior sequoia ring record: Tree-Ring Bull., v. 16, p. 2–6.Google Scholar
Heymann, D. and Schaeffer, O. A., 1962, Constancy of cosmic rays in time: Physica, v. 28, p. 773–775.Google Scholar
Ralph, E. K., Michael, H. N., and Gruninger, J. Jr., 1965, Univ. of Pennsylvania Dates VII: Radiocarbon, v. 7, p. 179–186.CrossRefGoogle Scholar
Ralph, E. K. and Michael, H. N., 1967, Problems of the radiocarbon calendar: Archaeometry, v. 10, p. 3–11.CrossRefGoogle Scholar
Stuiver, Minze, 1967, Origin and extent of atmospheric 14C variations during the past 10,000 years, in: Radioactive dating and methods of low-level counting, SM 87/43, p. 27–40, Internatl. Atomic Energy Agency, Vienna.Google Scholar