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Table T1. Downhole tool strings used during Expedition 346.

Tool string Tool Definition Primary outputs
Paleo combo EDTC Enhanced Digital Telemetry Cartridge Total gamma Environmentally corrected gamma ray (for borehole diameter) Borehole fluid temperature
HNGS Hostile Environment Natural Gamma Ray Sonde Total gamma Computed gamma (uranium concentration removed) Uranium concentration Thorium concentration Potassium concentration
HLDS Hostile Environment Litho-Density Sonde Density Photoelectric factor Caliper
HRLA High-Resolution Laterolog Array Tool Formation electrical resistivity at 5 depths of investigation Computed “true formation resistivity” Drilling fluid electrical resistivity
MSS Magnetic Susceptibility Sonde Magnetic susceptibility
FMS-sonic EDTC Enhanced Digital Telemetry Cartridge Total gamma Environmentally corrected gamma ray (for borehole diameter) Borehole fluid temperature
HNGS Hostile Environment Natural Gamma Ray Sonde Total gamma Computed gamma (uranium concentration removed) Uranium concentration Thorium concentration Potassium concentration
DSI Dipole Sonic Imager Compressional slowness
GPIT General Purpose Inclinometry Tool Hole azimuth Hole deviation
FMS Formation MicroScanner Resistivity images

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