Figure F37. Comparison of magnetic susceptibility from multisensor track (MST) measurements of whole-core sections and downhole measurements (pass 1 of the GHMT tool string) and of thorium measured by the NGT tool string and photoelectric effect (PEF) from the hostile environment lithodensity sonde (HLDS). Also shown are CaCO₃ from core samples and PEF as well as bulk density from downhole and core logging. IU = instrument units.