Global ETD Search
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Showing 1 to 5 of 5 for “"contourites"”.
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Bottom currents and abyssal sedimentation processes south of Iceland
… sandy turbidites and current-winnowed 'sandy contourites' are present in the axis of the major submarine canyon. ‘ Sandy contourite' deposits beneath the axis of the Iceland-Scotland Overflow Current are very poorly sorted muddy sands lacking primary sedimentary structures. Bioturbation is …
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Do Muds Sort? Experimental Test of a Hypothesis Key to Understanding Marine Bottom Currents
Accumulations of fine sediments in deep-ocean contourites form a sedimentary record that has been hypothesized to be directly related to bottom-current behavior. This is known as the 'sortable silt' hypothesis and states that the non-cohesive, coarse silt in the 10 to 63 µm size range within a …
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Sedimentology and micropalaeontology of gravity cores from the N.E. Atlantic continental slope south west of Ireland
… remove the fragmented tests. Parallellaminated contourites and evidence of erosion were noted in all cores. Ten cores penetrated sediments deposited during the last glacial maximum of 20,000 B.P - 18,000 B.P. near the 75cm depth mark (Core 1865 was too short to reach such sediments). However …
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Megaturbidites and the late Quaternary regional sedimentology of the eastern and central Mediterranean Sea
… scour the region, creating sediment drifts (contourites) with heightened sedimentation rates via a process herein termed '<i>bottom current flow lofting</i>' and interaction with downslope processes. Local volcanism, relatively undisturbed hemipelagic sediment accumulation and sapropel …
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Deep-marine depositional systems of the western North Atlantic: Insights into climate and passive-margin evolution
Stratigraphic successions of sedimentary rocks represent an important repository for signals pertaining to the history and evolution of Earth. Whereas the specific processes reflected by the stratigraphic record differ with respect to a given depositional environment, deposits in deep-marine …