Dictionary:Fig P-17

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FIG. P-17. Pseudosection. The apparent resistivity ρ1,4 (when the current electrodes A and B are centered at 1 and the potential electrodes M and N are centered at 4) is plotted 45° below 1 and 4. Data for other pairs of measurements are plotted similarly. Apparent resistivities are then contoured to suggest variations with depth and location (but the pseudosection cannot be directly interpreted as showing resistivity variations with depth). Similar methods are used for plotting induced polarization and other data.