Geomorphological imprint of opposing ocean bottom currents, a case study from the southeastern Brazilian Atlantic margin

The combination of oceanographic processes and a negligible fluvial terrestrial sediment contribution makes the Santos Basin margin (southwestern Brazil) unique environment for studying thew morphological imprint bottom currents on seafloor morphology. We divide into four domains: outer shelf, upper, middle, lower slope, based an analysis sub-bottom Chirp profiles, multichannel seismic data, hydrographic numerical simulation outputs, seismic-derived bathymetry map. A clinoform at shelf upper topped by erosional morphologies, developed below SW-flowing Brazil Current (BC). At rugged mounded surface around 600 mbsl coincides with current flow reversal to underlying NE-flowing Intermediate Western Boundary (IWBC). smooth middle slope exhibits sheeted contourites interrupted occasional channel-and-mound complexes. From base, salt tectonics becomes major player in setting slope-parallel Channel develops above subsurface diapir Cabo Frio Fault. latter divides between landward gap Albian basinward rich realm. Hence, is reworked Deep (DWBC); however, dictates its Our study consists example morpho-sedimentary counter-current flowing continental also exploring interaction flows suite endogenic processes, such as tectonics, fluid flows, mass movements.