Hostname: page-component-76fb5796d-qxdb6 Total loading time: 0 Render date: 2024-04-27T20:54:18.069Z Has data issue: false hasContentIssue false
  • English
  • Français

Birmingham University Radiocarbon Dates III

Published online by Cambridge University Press:  18 July 2016

F. W. Shotton ,
D. J. Blundell  and
R. E. G. Williams
F. W. Shotton
Affiliation:
The University of Birmingham, Birmingham, England
D. J. Blundell
Affiliation:
The University of Birmingham, Birmingham, England
R. E. G. Williams
Affiliation:
The University of Birmingham, Birmingham, England
Rights & Permissions [Opens in a new window]

Abstract

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 have continued with the 6 L counter. A counter of similar design but with 1 L volume has recently been brought into operation. Despite replacement of the teflon parts, the 1.5 L Oeschger-type counter has not worked consistently and has not been used for dating. Results are not corrected for δ C13. Errors quoted refer only to the standard deviation calculated from a statistical analysis of count rates and the Libby half-life of 5570 ± 30 yr.

Alkali pretreatment is used for all samples of charcoal, peat, wood, and plant material provided they are of sufficient quantity. It is now standard practice to boil the sample in 5% HCl solution and filter, both before and after boiling it in 2% NaOH solution. Between each treatment it is washed in boiling distilled water and is finally oven dried at 110°C. Concentrations of acid and alkalis are varied to suit each sample but the sequence of the pretreatment is always the same. In some cases a humate extract is obtained by precipitation with weak acid from the alkali solution filtrate.

The collagen fraction is obtained from samples of bone using the method of Krueger (1966) by treatment with dilute acid under reduced pressure. The gas evolved during the treatment is usually discarded but is occasionally retained and dated as the mineral fraction.

After mechanical cleaning, samples of shell are dissolved in stages with 6N HCl to divide them into two or three fractions corresponding to the outer, middle, and inner layers of the shell. Normally the outer fraction is discarded when three fractions have been prepared.

Type
Research Article
Information
Radiocarbon , Volume 11 , Issue 2 , 1969 , pp. 263 - 270
Copyright
Copyright © The American Journal of Science 

References

Date lists: Google Scholar
Birmingham II Shotton, , Blundell, , and Williams, , 1968 Google Scholar
Pisa I Ferrara, , Reinharz, , and Tongiorgi, , 1959 Google Scholar
Barfield, L. H., 1966, Excavations on the Rocca di Rivoli: Mus. Civico di Storia Nat. di Verona, Mem. v. 14, p. 1–100.Google Scholar
Broeker, W. S., 1963, Radiocarbon ages of Antarctic materials: Polar Record, v. 11, no. 73, p. 472.Google Scholar
Catt, J. A. and Penny, L. F., 1966, The Pleistocene deposits of Holderness, Yorkshire: Yorkshire Geol. Soc. Proc., v. 35, p. 375–408.Google Scholar
Clark, J. G. D. and Godwin, H., 1957, A Maglemosian site at Brandesburton, Holderness, Yorkshire: Prehist. Soc. Proc., v. 22, p. 6–22.CrossRefGoogle Scholar
Ferrara, G., Reinharz, M., and Tongiorgi, E., 1959, Carbon-14 dating in Pisa: Am. Jour. Sci. Radiocarbon Suppl., v. 1, p. 103–110.Google Scholar
Krueger, H. W., 1966, The preservation and dating of collagen in ancient bones, in: Proc. 6th Internatl. Conf. radiocarbon and tritium dating, 1965, Pullman, Washington, p. 332–337.Google Scholar
Morgan, Anne, 1969, A Pleistocene fauna and flora from Great Billing, Northamptonshire, England: Opusc. Entomol. Lund, v. 34, p. 109–129.Google Scholar
Orme, A. R., 1966, Quaternary changes of sea-level in Ireland: Inst. British Geog. Trans. and Papers, no. 39, p. 127–143.Google Scholar
Poole, E. G. and Whiteman, A. J., 1966, Geology of the country around Nantwich and Whitchurch: Great Britain, Geol. Surv. Mem., no. 122.Google Scholar
Shotton, F. W., Blundell, D. J., and Williams, R. E. G., 1968, Birmingham University radiocarbon dates II: Radiocarbon, v. 10, p. 200–206.CrossRefGoogle Scholar
Watts, W. A., 1959, Interglacial deposits at Kilbeg and Newtown, Co. Waterford: Royal Irish Acad. Proc., v. 60, sec. B, p. 79–134.Google Scholar
Wilson, D. M. and Hurst, D. G., 1964, Medieval Britain in 1962 and 1963: Medieval Archaeol., v. 8, p. 231–299.Google Scholar
Wood, A. and Woodland, A. W., 1968, Borehole at Mochras, W of Llanbedr, Merionethshire: Nature, v. 219, p. 1352–1354.Google Scholar