Figure F1. Compressional wave velocity at 200 MPa is displayed as a function of porosity for selected cores from Hole 735B acquired during ODP Leg 176. In these very low porosity samples, with all values <0.75%, there does not appear to be a relationship between compressional wave velocity and porosity. It is generally assumed that at 200 MPa, pressures typical of the lower crust, all of the microcracks have been squeezed shut. Igneous lithology (Shipboard Scientific Party, 1999): o = olivine gabbro, + = gabbronorite, x = troctolitic gabbro.

Figure F1. Compressional wave velocity at 200 MPa is displayed as a function of porosity for selected cores from Hole 735B acquired during ODP Leg 176. In these very low porosity samples, with all values <0.75%, there does not appear to be a relationship between compressional wave velocity and porosity. It is generally assumed that at 200 MPa, pressures typical of the lower crust, all of the microcracks have been squeezed shut. Igneous lithology (Shipboard Scientific Party, 1999): o = olivine gabbro, + = gabbronorite, x = troctolitic gabbro.