Answers are grounded in this paper and cite their sources.
The following date list includes archaeologic and geologic samples dated by Gif Radiocarbon Laboratory mostly from 1973 to 1975. Volcanic samples reported here were dated up to 1981. Measurements were made in the same manner as previously reported (R, 1972, v 14, p 280). For undersized samples, a 0.1L CO 2 proportional counter was used with 5000-minute standard measurements. Ages listed are conventional 14 C ages based on the 5568-year Libby half-life; uncertainties are 1σ statistical standard error. Results are based on 95% of NBS oxalic acid activity. Some dates have been calibrated using the correction curve of Klein et al (1982).
No takes yet. Share an insight, caveat, or question.
Delibrias et al. (1986) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: