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Geomorfologia sísmica das feições de sub-fundo submarino da Margem Catalã, Mediterrâneo Ocidental

Authors: Guilherme Caetano Garrido; Antonio Tadeu dos Reis; Christian Gorini;

Geomorfologia sísmica das feições de sub-fundo submarino da Margem Catalã, Mediterrâneo Ocidental

Abstract

The Catalan margin, West Mediterranean Sea, stands as a distinct sector of the Gulf of Lions, concerning its general orientation and regional morphology. It corresponds to a N-S oriented margin that extends along the Spanish and French continental margins, in the northwest of Gulf of Lion. Geomorphological analysis of high resolution multibeam bathymetric data (made available by IFREMER in France), coupled with seismic facies analysis of 2D multichannel lines, allowed the recognition of a variety of sea-bottom morphology across this margin, imprinted as a result of both structural and depositional processes. Geomorphological and seismic analyses carried out in the study revealed the occurrence of 4 main types of morpho-sedimentary domains across the margin dominated by the occurrence of either: (a) conturite drifts; (b) elongated mounded drifts; (c) sheeted drifts; (d) gravity-driven sedimentation. All these above mentioned morpho-sedimentary elements point out to a combined effect of turbidite deposition and contour-current-controlled deposition across the Catalan margin. The variability of the mapped seismic facies reveals as wel that, in spite of the influence of contour currents across the margin, bottom current-controlled deposition follows different degrees of interaction between hidro-dynamic factors, associated with the Mediterranean Northen Current, different amounts of sedimentary input and the different levels of bathymetric control depending on the sector considered.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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Italian National Biodiversity Future Center
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