Velocity vs. porosity is plotted for the in situ corrected core data for all three sites (Fig. F10). These data are plotted for both above and below the décollement (Fig. F10A) and then for below the décollement only (Fig. F10B). The plot for data above and below the décollement does not show a significant trend of increasing velocity with decreasing porosity, whereas there is a much more obvious trend for the underthrust sediments. The bounding equations from Erickson and Jarrard (1998) for normal and high consolidation are also plotted for the underthrust sediments (Fig. F11). The underthrust data lie mostly within the bounds of these equations but follow the normal consolidation trend more closely.
The fitted parameters are listed in Table T1, which includes the sensitivity of the fit to each parameter. The parameters for Equations 2 and 3 are also listed for comparison. The root mean square (RMS) of the residuals for these parameters is ±73.34 m/s. The best-fit formulation is plotted in Figure F11.
In addition to the Erickson and Jarrard (1998) formulations, the velocity-porosity relationship from Hyndman et al. (1993) for Site 808 is plotted for comparison (Fig. F11). Porosity () is given in terms of compressional velocity (V in km/s):