Channel and inter-channel morphology resulting from the long-term interplay of alongslope and downslope processes, NE Rockall Trough, NE Atlantic

With this contribution we use a pair of overlapping 3D seismic surveys and two exploration wells to document the response long-lived slope channels onset bottom currents sweeping lower in NE Rockall Basin, offshore Ireland. Downslope gravity current activity, linked phase uplift, prevailed throughout Eocene led formation multiple channels, most notably large-scale sinuous channel complex (Channel 4 Complex) tied persistent sediment entry point on margin. Channels fed lobes floor basin, with increased axial tilting forcing flow parallel base slope. A margin-wide differential subsidence basin deepening Late then activated circulation across basin. Northward-flowing first erosionally refashioned creating prominent unconformity contourites that initially forming infill drifts. Bottom swept along obliquely upslope, building plastered drifts straddled sections still active channels. The modified amplified spurs separating interaction between downslope processes accreting built maintained relief allowed mouths extend further basinward over earlier lobes. Contourite-forced extension account depositional re-profiling represents another manifestation interplay currents. In case Rockall, accreted wedge mounded geometry resembles similar features elsewhere eastern Those have previously been ascribed mass-transport base-up initiation, however, similarities are so striking propose these also result by