1973
DOI: 10.1017/s0033822200008924
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Birmingham University Radiocarbon Dates VII

Abstract: The following list of dates contains all measurements made during 1972, i.e., since our last list. Counting equipment, operating procedures and sample pretreatment are the same as previously described (R., 1969, v. 11, p. 263). Age calculations are based on 95% activity of the NBS oxalic acid standard computed from the Libby half-life of 5570 ± 30 yr. Background samples are synthesized from Welsh anthracite. Errors quoted refer only to the standard deviation (1σ) calculated from a statistical analysis of sampl… Show more

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Cited by 34 publications
(15 citation statements)
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“…The 68.2% and 95.4% probability ranges for the modeled ranges are indicated below each histogram. (Reimer et al 2004) using OxCal 4.1.5 (Bronk and dated by gas proportional counting of methane according to methods in Shotton et al (1969Shotton et al ( , 1974 and Shotton and Williams (1973).…”
Section: Resultsmentioning
confidence: 99%
“…The 68.2% and 95.4% probability ranges for the modeled ranges are indicated below each histogram. (Reimer et al 2004) using OxCal 4.1.5 (Bronk and dated by gas proportional counting of methane according to methods in Shotton et al (1969Shotton et al ( , 1974 and Shotton and Williams (1973).…”
Section: Resultsmentioning
confidence: 99%
“…There is little dating evidence from the area, excepting that all the sites lie well within the limit of the Last Glacial Maximum. Fragments of boreo-arctic marine shells from the Big Aird Sandpit [NX 098 602] located in moundy glaciofluvial gravels near Stranraer, have provided radiocarbon dates of >37 ka 14 C BP, >33ka 14 C BP, and 28,940 +850/ -770 14 C BP (outer, middle and inner respectively) (Shotton and Williams, 1973). In view of the sandy sediment (permeable) and the fact that the dates were obtained from fragments of 10 species, some contamination by young carbon is to be expected.…”
Section: Discussionmentioning
confidence: 99%
“…Shell fragments typically occur in the lower till, but are also found within the upper till and in overlying glaciofluvial sand and gravel (Moore, 1850;Stone, 1995;Sutherland, 1993;Shotton and Williams, 1973). The two tills are locally separated by a bed of sand from which, at one site, sand-filled ice cast wedges extend downwards into the lower till (Kerr, 1982).…”
Section: Introductionmentioning
confidence: 99%
“…Comment: date agrees with written records indicating that eruption of Sete Cidades was occurring at time of Portuguese discovery and initial settlement of the Azores ca AD 1444 (van Padang et al 1967). Shotton and Williams (1971)…”
Section: ° 20°mentioning
confidence: 99%