نتایج جستجو برای: contourite

تعداد نتایج: 105  

Journal: :Deep-sea Research Part I-oceanographic Research Papers 2021

In this paper we analyze how oceanic circulation affects sediment deposition along a sector of the Ross Sea continental margin, between Iselin Bank and Hillary Canyon, these processes evolved since Late Miocene. The Canyon is one few places around Antarctic margin where dense waters produced onto shelf, mainly through brine rejection related to sea ice production, flow down slope reach deep bot...

Journal: :Marine Geology 2021

Multibeam bathymetric imagery and acoustic sub-bottom profiles are used to reveal distribution patterns of sub-surface sedimentation in Dove Basin (Scotia Sea). The goals the study determine imprint inflow deep Antarctic water masses from Weddell Sea into Scotia Sea, establish factors driving styles contourite deposition discern relative contribution alongslope versus downslope processes constr...

Journal: :Marine Geology 2021

A better understanding of the evolution bottom current circulation and associated deposits is significant for many applications including paleoclimatology geological hazard. Besides large contourite drifts, currents may generate fields sediment waves that, depending on their height velocity migration, pose severe risk infrastructures. Conversely, time span paleoceanographic record generally rel...

Journal: :Earth-Science Reviews 2022

The deep-marine environment is a complex setting in which numerous processes —settling of pelagic and hemipelagic particles the water column, sediment gravity flows (downslope density currents; turbid flows), bottom currents— determine deposition, hence variety facies including pelagites/hemipelagites, contourites, turbidites hyperpycnites. Characterization differentiation among deep-sea challe...

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