Fig. 3 | Scientific Data

Fig. 3

From: Infrared spectral library of tooth enamel from African ungulates for accurate electron spin resonance dating

Fig. 3

Grinding curves of fossil teeth from Lovedale (South Africa) compared to a reference curve of springbok (dashed line). The three most recrystallised specimens, which exhibit greater curve offset compared to the springbok curve, are also the richest in uranium (ranging from 9.7 to 29.6 ppm). All other specimens are characterised by amounts of uranium ranging from 1.7 to 5.8 ppm (data from Richard et al.9,14).

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