Figure 5.

Plot of ⁸⁷Sr/⁸⁶Sr and δ¹⁸O_carbonate values of human and cattle enamel from Penywyrlod (Talgarth) and Ty Isaf, Powys, Wales. Dashed lines delineate locally bioavailable ⁸⁷Sr/⁸⁶Sr values measured in plants growing within a radius of 10 miles (approximately 16 km) of both sites (Table 3). Red symbols: human individuals from Penywyrlod long cairn. Blue symbols denote human individuals of mid to late 4^th millennium date from Ty Isaf. Open white symbols: first and second deciduous premolars of a child of Bronze Age date from Ty Isaf. Radiocarbon dates cited at 95% confidence. Tooth types are denoted by the key in the upper right of the diagram. Arrows illustrate adjacent molars from the same individual. 2σ errors for ⁸⁷Sr/⁸⁶Sr are within the symbol. 2σ errors for ⁸⁷Sr/⁸⁶Sr are within the symbol. Analytical error for δ¹⁸O_carbonate is shown as ± 0.2 ‰ (2σ)