Contourite sediment accumulations at continental margins are related to strong bottom water circulation, where intense winnowing can result in neoformation of authigenic grains glauconite the seafloor. In this study, we investigated whether such could faithfully record ambient bottom-water neodymium (Nd) isotopic compositions, and hence be used as paleoceanographic archives. To purpose, measure...

Interplay of deep-water sedimentary processes is responsible for building a myriad features and deposits across mixed turbidite–contourite systems, from <5 cm beds to >200 km long drifts. Investigations the spatial temporal variability their facies associations crucial reveal dynamics between along-slope bottom currents down-slope turbidity currents, as well impact on drift construction channel...

Abstract The underpinning problems of deep-water facies still remain unresolved. (1) Tb, Tc, and Td divisions the turbidite model, with traction structures, are an integral part “Bouma Sequence” (Ta, Td, Te). However, deposits thermohaline contour currents, wind-driven bottom deep-marine tidal baroclinic currents (internal waves tides) also develop discrete rippled units, mimicking Tc. (2) appl...

The bi-gradational sequence (C1-C5) is the standard facies model for fine-grained, mixed mud-sand contourites. Drilling in Gulf of Cadiz during IODP 339 recovered over 4.5 km contourites with 1600 distinct contourite sequences, having an average thickness 3 m (range 0.5–7.5 m). This study documents past 1.1 My succession at Site U1389, which there are a total 299 full and partial variable 0.13–...

Submarine lobes form at the distal end of sediment gravity flow systems and are globally important sinks for sediment, anthropogenic pollutants organic carbon, as well forming hydrocarbon CO 2 reservoirs. Deep-marine, near bed or bottom currents can modify pathways distribution by directly interacting with modifying seafloor morphology. Deciphering nature gravity- interaction, particularly in a...