Abstract

Northwest and middle European Upper Cretaceous pelagic carbonates contain abundant gravity-transported sediments in short-lived stratigraphic intervals of 100-500 ka. Redeposition terminates synchronously in different basins at horizons that are always overlain by deeper water sediments. These horizons can be correlated with defined sequence boundaries that are believed to be caused by eustatic sea-level falls. The change of hydrostatic pressure in the water column during sea-level fluctuations was not in equilibrium with pore-water pressures in the fine-grained sediments. About 10% of the hydrostatic pressure at times of sea-level highstands was preserved in the sediment as pore-water overpressure during sea-level falls. This may have caused sediment failure. Theoretical considerations agree with the observed degree of redeposition.

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