Initial Reports Volume 191 Chapter 4, Table 16. Average physical properties by lithostratigraphic unit. Lithostratigraphic unit Bulk density (g/cm3) Grain density (g/cm3) Porosity (%) Void ratio P-wave velocity (m/s) Thermal conductivity (W/[m·K]) I 1.265 +/- 0.003 2.470 +/- 0.010 83.3 +/- 0.2 5.11 +/- 0.06 1541.0 +/- 2.4 0.75 +/- 0.01 II 1.329 +/- 0.005 2.463 +/- 0.023 78.8 +/- 0.4 3.74 +/- 0.09 1549.6 +/- 1.8 0.80 +/- 0.01 III 1.54 +/- 0.02 2.5 67.3 +/- 1.2 2.52 1517.6 +/- 4.4 0.91 +/- 0.02 IV V 2.745 +/- 0.029 5002 +/- 39