D. Van Rooij, Veerle A.I. Huvenne, Ben De Mol, Bert Lietaert, Bram Van Eetvelt, Dominique Blamart, Eva Isabel Cacho Lascorz, I. Nicholas McCave, Jean-Pierre Henriet
Along the eastern slope of the Porcupine Seabight, both cold-water coral mounds and a contouritedepositional system have developed since the start of the Quaternary. However, evidence of Miocene bottomcurrents has been documented in deeper seismic sections. Variations in bottom current strength over the last 10Ma have been instrumental as a driver for the localization and growth of these cold-water coral mounds. Viceversa, these biogenic build-ups have influenced the lateral variability and morphology of the contourite depositionalsystem. Both mounds and Quaternary drifts formed on top of a widespread unconformity, RD-1, that represents ahiatus of ~7 Ma (IODP Exp. 307 results). However, high-resolution seismic profiles have indicated the erosionphase may have been shorter, occurring in several phases within the Pliocene. This episode co-occurred with theintroduction of the Mediterranean Outflow Water in the Porcupine Seabight, which is the present-day driver oflocally strong bottom currents through internal tides.
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