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Figure 2


Fig. 2. STXM micrographs for an interior aggregate region taken (a) below 281 eV and (b) above 290 eV the carbon absorption edge. Contrast in the C and mineral density is shown in the ratio micrographs (c) calculated from–log [I/Io] where I = {Sigma} (281 eV – 282 eV) and Io = {Sigma} (290.6 eV – 291.5 eV).