Overpressure and fluid flow in the New Jersey continental slope: Implications for slope failure and cold seeps

Miocene through Pleistocene sediments on the New Jersey continental slope ( Ocean Drilling Program Site 1073) are undercompacted (porosity between 40 a nd 65%) to 640 meters below the sea floor, and this is interpreted to recor d fluid pressures that reach 95% of the lithostatic stress. A two-dimension al model, where rapid Pleistocene sedimentation loads permeable sandy silt of Miocene age, successfully predicts the observed pressures. The model des cribes how lateral pressure equilibration in permeable beds produces fluid pressures that approach the lithostatic stress where overburden is thin. Th is transfer of pressure may cause slope failure and drive cold seeps on pas sive margins around the world.