Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-22T12:35:18.589Z Has data issue: false hasContentIssue false
  • English
  • Français

University of Pennsylvania Dates VII

Published online by Cambridge University Press:  18 July 2016

Elizabeth K. Ralph ,
Henry N. Michael  and
John Gruninger Jr.
Elizabeth K. Ralph
Affiliation:
Department of Physics, University of Pennsylvania, Philadelphia 4, Pa.
Henry N. Michael
Affiliation:
Department of Physics, University of Pennsylvania, Philadelphia 4, Pa.
John Gruninger Jr.
Affiliation:
Department of Physics, University of Pennsylvania, Philadelphia 4, Pa.
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.

Measurements of samples of known age have been undertaken in this laboratory since its beginning in 1951 when it was found that modern wood samples taken from the outer rings of young trees did not afford a basis of counter calibration consistent with archaeologically dated samples (Ralph, 1955). This depletion was explained by Suess (1955). Subsequent measurements of samples representative of the early Egyptian dynasties, however, revealed that even with the counter calibration corrected for the modern depletion, there was a discrepancy between C14 dates and the early Egyptian chronology (Arnold and Libby, 1951; deVries, Barendsen, and Waterbolk, 1958; deVries and Waterbolk, 1958; Barker and Mackay, 1959, 1961; Ralph, 1959; Damon and Long, 1962). Obviously, there was, and still is, a need to find samples of known age for this time range. Dendrochronology may ultimately provide the answer, and in the meantime tree-ring dated samples have afforded a means of assessing the atmospheric C14 inventory during the last 3000 yr.

Type
Research Article
Information
Radiocarbon , Volume 7 , 1965 , pp. 179 - 186
Copyright
Copyright © The American Journal of Science

References

Arnold, J. R., and Libby, W. F., 1951, Radiocarbon dates: Science, v. 113, p. 111.CrossRefGoogle ScholarPubMed
Barker, H., and Mackey, C. J., 1959, British Museum natural radiocarbon measurements I: Am. Jour. Sci. Radioc. Supp., v. 1, p. 83–85.Google Scholar
Barker, H., and Mackey, C. J. 1961, British Museum natural radiocarbon measurements III; Radiocarbon, v. 3, p. 39–45.CrossRefGoogle Scholar
Broecker, W. S., Olson, E.A., and Bird, J., 1959, Radiocarbon measurements on samples of known age: Nature, v. 183, p. 1582–1584.CrossRefGoogle Scholar
Craig, H., 1954, Carbon-13 variations in Sequoia rings and the atmosphere: Science, v. 119, p. 141–143.CrossRefGoogle ScholarPubMed
Damon, P. E., and Long, A., 1962, Arizona radiocarbon dates III: Radiocarbon, v. 4, p. 204–238.CrossRefGoogle Scholar
Damon, P. E., 1963, Carbon-14, carbon dioxide and climate: Paper delivered at IUGG 13th Assembly, Berkeley, California.Google Scholar
Damon, P. E., Long, A., and Sigalove, J. J., 1963, Arizona radiocarbon dates IV: Radiocarbon, v. 5, p. 285–286.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 pub. 289, v. 1, p. 44–53.Google Scholar
Douglass, A. E. 1928, Climatic cycles and tree growth, v. II: A study of the annual rings of trees in relation to climate and solar activity: Carnegie Inst. of Washington pub. 289, v. 2, p. 5–56 and p. 139–158.Google Scholar
Douglass, A. E., 1936, Climatic cycles and tree growth, v. III: A study of cycles: Carnegie Inst. of Washington pub. 289, v. 3, p. 3 and p. 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
Ralph, E. K., 1955, Univ. of Pennsylvania radiocarbon dates I; Science, v. 121, p. 149.CrossRefGoogle Scholar
Ralph, E. K. 1959, Univ. of Pennsylvania radiocarbon dates III: Am. Jour. Sci. Radioc. Supp., v. 1, p. 47–48.Google Scholar
Schulman, E., 1954, Dendroclimatic changes in semiarid regions: Tree-Ring Bull., v. 20, p. 26–30.Google Scholar
Schulman, E. 1956, Dendroclimatic changes in semiarid America: Tucson, Univ. of Arizona Press, 142 p.Google Scholar
Schulman, E. 1958, Bristlecone pine, oldest known living thing: Natl. Geog. Mag., v. 113, p. 355–372.Google Scholar
Suess, H. E., 1955, Radiocarbon concentration in modern wood: Science, v. 122, p. 415–417.CrossRefGoogle Scholar
Suess, H. E. 1961, Secular changes in the concentration of atmospheric radiocarbon: in Problems related to interplanetary matter, proc. of an informal conference, Highland Park, Illinois; Natl. Acad. of Sci., pub. 845, p. 90–95.Google Scholar
Vries, H. de, 1958, Variation in concentration of radiocarbon with time and location on earth: Proc. Kon. Ned. Akad. van Wetenschappen, ser. B, v. 61, p. 1–9.Google Scholar
Vries, H. de, and Waterbolk, H. T., 1958, Groningen radiocarbon dates III: Science, v. 128, p. 1550–1556.CrossRefGoogle ScholarPubMed
Vries, H. de Barendsen, G. W., and Waterbolk, H. T., 1958, Groningen radiocarbon dates II: Science, v. 127, p. 129–137.CrossRefGoogle ScholarPubMed
Willis, E. H., Tauber, H., and Munnich, K. O., 1960, Variations in the atmospheric radiocarbon concentration over the past 1300 years: Am. Jour. Sci. Radioc. Supp., v. 2, p. 1–4.Google Scholar