Figure F9. Effective stress, void ratio, and hydraulic conductivity profile for Site 1261. Stress history data from Unit I sediments were used to determine the maximum past effective stress profile for the sedimentary column (Equation 19) and predict the in situ e from consolidation tests (Equation 18). At Site 1261, 600 kPa (determined from the highest OCR of Unit I samples from the site) was added to the hydrostatic effective stress to predict the e of sediments using consolidation tests (Table T1). Below Unit I, consolidation results from lithologic units recovered at other sites were used to predict in situ e. Laboratory measurements of e (gray diamonds) were rebound corrected (Equation 17, black triangles) using the hydrostatically determined effective stress profile (Equation 5). The hydraulic conductivity of sediments was calculated in two ways: (1) by using the e-log(k) relationship for individual lithotypes on the rebound-corrected laboratory measurements of e (black stars) and (2) by applying the e-log(k) relationship to the predicted e profile (orange line) (Table T3). Often the predicted e overestimates the measured e, and thus serves as an upper bound to sediment permeability. For Unit III, an upper and lower permeability were determined by applying the e-log(k) relationship from Samples 207-1257C-6R-3, 140 cm, and 207-1258B-36R-2, 45 cm. Blue shading represents a qualitative estimate for the possible range of hydraulic conductivity within each lithologic unit.

Figure F9. Effective stress, void ratio, and hydraulic conductivity profile for Site 1261. Stress history data from Unit I sediments were used to determine the maximum past effective stress profile for the sedimentary column (Equation 19) and predict the in situ e from consolidation tests (Equation 18). At Site 1261, 600 kPa (determined from the highest OCR of Unit I samples from the site) was added to the hydrostatic effective stress to predict the e of sediments using consolidation tests (Table T1). Below Unit I, consolidation results from lithologic units recovered at other sites were used to predict in situ e. Laboratory measurements of e (gray diamonds) were rebound corrected (Equation 17, black triangles) using the hydrostatically determined effective stress profile (Equation 5). The hydraulic conductivity of sediments was calculated in two ways: (1) by using the e-log(k) relationship for individual lithotypes on the rebound-corrected laboratory measurements of e (black stars) and (2) by applying the e-log(k) relationship to the predicted e profile (orange line) (Table T3). Often the predicted e overestimates the measured e, and thus serves as an upper bound to sediment permeability. For Unit III, an upper and lower permeability were determined by applying the e-log(k) relationship from Samples 207-1257C-6R-3, 140 cm, and 207-1258B-36R-2, 45 cm. Blue shading represents a qualitative estimate for the possible range of hydraulic conductivity within each lithologic unit.