Initial Reports, Volume 206 Ms 206IR-103 Chapter 3, Table T25. Heat flow data, Hole 1256B. Depth (mbsf) Temperature (°C) Thermal gradient (K/m) Thermal conductivity (W/[m x K]) Heat flow (mW/m2) 0 1.42 0.165 0.725 120 53.6 10.29 0.164 0.702 114.7 82.1 14.94 0.149 0.727 108.5 120.1 20.62 0.106 0.933 108.7 158.1 25.05