Extended Data Fig. 9: Distribution of strontium isotopic ratio.
From: Elemental signatures of Australopithecus africanus teeth reveal seasonal dietary stress
a, b, Location of the laser-ablation spot (150 μm) along the enamel and dentine for StS 51A (a) and StS 28C (b). Circles with red filling correspond to the first point (1) and yellow filling to the final point (point 9 for enamel, and point 6 for dentine). The table below shows the 87Sr/86Sr isotopic ratio and associated errors for each laser-ablation spot measured above. All values measured in both teeth (including point 6 in the dentine of StS 28, with associated error) correspond to values of the Malmani dolomite that surrounds Sterkfontein (the 87Sr/86Sr ratio of the Malmani dolomite ranges between 0.723 and 0.734)3, which shows that both specimens had limited mobility.
