Fig. 6

Formation conductivity (mS/m) in the Holocene aquitard interpreted from induction logs. A formation electrical conductivity of 550Â mS/m and 1500Â mS/m corresponds to pore water chloride concentrations of 5000Â mg/L and 16,000Â mg/L, respectively. For comparison is the chloride concentration in oceanic water 18,900Â mg/L. Map background produced in MapInfo Pro 15.0 using data from National Center for Water Resources Planning and Investigation. Contours produced by Surfer v. 24.