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Fig. 12 | Heritage Science

Fig. 12

From: Artificial weathering of rock types bearing petroglyphs from Murujuga, Western Australia

Fig. 12

a Spider plot of the element concentration in the blank artificial rainwater and in the artificial rainwater that was rinsed over the granophyre or gabbro samples. The detection limits are also plotted. b Spider plot of the change in element concentration normalised to the oxide concentration of the sample surface that was determined by PXRF (see Fig. 11). The value for Fe from gabbro 1.2 is not displayed, because it is slightly negative

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