. Early geophysical papers of the Society of Exploration Geophysicists . D (. f V>N S^' ⢠â <;\ . <» -is* ' sr w * -1 Oiservec' Dofit t *â *- jr 4f t Jnttrprtt Curves or'*!* w ftCT Fig. i8.â^4 to C: Apparent resistivities as function of depth to boundary and as function of k, for separations of 50,100, and 150 feet (after Tagg). D: Application of above diagrams in depth determinations.

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