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Fig. 19

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Silicification mechanisms. (a) Schematic showing phenomena that could account for replacement of limestone matrix by silica as well as precipitation of quartz on walls of the voids or fractures carrying groundwater. After Thiry and Ribet (1999). (b) Development of observed mineralogical sequence along the flow path of incoming silica-laden groundwater solutions. After Thiry et al. (2014).

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