(Table 1) Results of consolidaten tests for ODP Hole 131-808C and DSDP Hole 87-582 samples

Uniaxial reconsolidation tests were conducted on samples from four whole-round cores of similar hemipelagic silty mudstones from the Shikoku Basin sequence recovered at DSDP Site 582 and ODP Site 808. Two cores from Site 808 were from below the d?collement, in the prism toe, and two from Site 582 were from the undeformed trench wedge. The objectives of testing included the estimation of maximum past consolidation stress, the in-situ stress, the exploration of relationships between physical properties and mechanical state of the naturally consolidated mudstones, and comparison of the behavior of these natural sediments with similar but experimentally consolidated mudstone. Testing also determined the effect of pressure between laboratory (1 bar) and in-situ conditions on seismic velocity and on porosity. […]