Figure F23. Main logs recorded in Hole 1228A. A. The hole diameter is measured by the caliper arm of the density sonde. B. The gamma ray log provides a measure of the natural radioactivity of the formation. C. Concentrations of potassium, thorium, and uranium derived from the gamma ray counts. D. Resistivity measured by the Phasor Dual Induction tool with three depths of investigation. E. Density log (red line) compared with density measurements made on core samples (shaded circles) (see "Density and Porosity" in "Physical Properties"). F. Porosity log for the two receiver spacings of the Accelerator Porosity Sonde (APS) compared with porosity measurements made on core samples (shaded circles) (see "Density and Porosity" in "Physical Properties"). HNGS = Hostile Environment Natural Gamma Ray Sonde, SGT = Scintillation Gamma Ray Tool.

Figure F23. Main logs recorded in Hole 1228A. A. The hole diameter is measured by the caliper arm of the density sonde. B. The gamma ray log provides a measure of the natural radioactivity of the formation. C. Concentrations of potassium, thorium, and uranium derived from the gamma ray counts. D. Resistivity measured by the Phasor Dual Induction tool with three depths of investigation. E. Density log (red line) compared with density measurements made on core samples (shaded circles) (see "Density and Porosity" in "Physical Properties"). F. Porosity log for the two receiver spacings of the Accelerator Porosity Sonde (APS) compared with porosity measurements made on core samples (shaded circles) (see "Density and Porosity" in "Physical Properties"). HNGS = Hostile Environment Natural Gamma Ray Sonde, SGT = Scintillation Gamma Ray Tool.