Initial Reports Volume 185 Chapter 4, Table T17. Average wet bulk density, porosity, and velocity of each lithologic unit and each lithology, calculated from discrete sample measurements. Wet bulk Grain Water P-wave velocity density density Porosity content (x direction) Lithology (g/cm3) (g/cm3) (%) (%) (m/s) 185-1149A, 1149B, 1149C, 1149D: Unit I Clay 1.42 2.62 75.5 54.8 1528 Unit IIA Clay 1.38 2.12 67.1 49.9 1520 Unit IIB Clay 1.40 2.20 67.6 43.5 1514 Unit III Chert 2.52 2.57 2.7 1.1 5167 Porcelanite 2.06 2.30 19.5 10.0 3429 Unit IV Chert 2.52 2.57 3.0 1.2 4958 Chalk 1.80 2.60 50.5 32.3 2280 Marl 2.32 2.69 22.8 10.9 2676 Basement Basalt 2.66 2.82 8.8 3.5 4821