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. Author manuscript; available in PMC: 2020 Jul 14.
Published in final edited form as: Nature. 2019 Jul 15;572(7767):112–115. doi: 10.1038/s41586-019-1370-5

FIG. 3: Elemental mapping of StS 51 A. africanus canine:

FIG. 3:

(A) Micrograph (×10) of StS 51B permanent lower canine. (B) Associated elemental mapping of 7Li/43Ca and (C) 138Ba/43Ca. Permanent canine teeth develop only a few months after birth, with completion of the crown between 3 and 4 years of age18. (D) Comparison of the temporal periodicity of Ba/Ca (black line and diamonds) and Li/Ca (red line and Xs) accentuated lines 1, 2, 3 and 4, along the transect (A). Li/Ca recurrence shows a slight temporal offset compared to Ba/Ca periodicity.