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. 2018 Jan 10;15(138):20170626. doi: 10.1098/rsif.2017.0626

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© 2018 The Author(s)

Published by the Royal Society. All rights reserved.

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Figure 9. — SXRF map of Sr in KNM-ER 1817 at 15 µm resolution (a) with green boundary box representing the location of SXRF maps of Ca (b), Sr (c), P (d), Zn (e) and Fe (f) at 1 µm resolution. Plots show Ca and Fe levels rise in the calcite containing cracks, but P, Sr and Zn levels in cracks fall to very low levels. Fluctuations in Ca, P and Sr levels may correspond with cementum increments visible in the transmitted light micrograph (figure 6a). Colour scales beneath each image denote concentration (ppm).