Figure 7. Present vertical effective stress (´) vs. burial, calculated from laboratory wet bulk densities of discrete samples for Sites 999, 1001, and 807 (data from Kroenke, Berger, Janecek, et al., 1991, and Sigurdsson, Leckie, Acton, et al., 1997). Modified preconsolidation: _k´ _pc´/ 2.5, as determined from loading experiments, are marked by crosses (Site 999) and diamonds (Site 1001).