Fig. 7. Resistivity vs. volumetric water content (W) for quartz–water–air (open symbols) and quartz–water–kerosene (solid symbols) samples. Solid lines show a power-law fit to the data for the two identified regions. The power-law exponent was found to be 0.21 for W < 0.08, and 1.3 for W > 0.08.