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Fig. 6. Pb LIII radial distribution functions (left) derived from XAS experiments given for two Oa samples collected from the coniferous zone at Camels Hump Mountain. Theoretical shell fitting was done using an oxygen and an iron shell in FEFF 7.02. On the right, Fourier-filtered data from the backtransformed spectrum over R + 
= 2.9 to 4.1 Å are given; these data are used to derive the Pb-Fe coordination numbers and interatomic distances that we report in the text.
