Data/hora: 06/06/2024 04:47:07

Provedor de dados: 	5	
País: 	France	
Título: 	Sand bodies at the shelf edge in the Gulf of Lions (Western Mediterranean): Deglacial history and modern processes	
Autores: 	Bassetti, Maria-angela; Jouet, Gwenael; Dufois, Francois; Berne, Serge; Rabineau, Marina; Taviani, M.	
Data: 	2006-12	
Ano: 	2006	
Palavras-chave: 	Gulf of Lions; Sand transport; Deglacial transgression; Outer shelf; Sand ridges.	
Resumo: 	The outer continental shelf of the Gulf of Lions is covered by thick, mainly regressive, sand deposits. A combination of seismic, sedimentological and geochronological methods allows us to demonstrate that a veneer of transgressive sand bodies, few m to less than 1 m thick, reworks these deposits. They take the form of sand ridges and transverse dunes that formed at different periods. In fact, the low-gradient outer shelf of the Gulf of Lions displays a complete record of deglacial history, including not only transgressive deposits that formed during sea-level rise, but also bedfonns that still evolve under episodic high-energy events that occur under more highstand conditions. Core lithology, C-14 dates and regional sea-level curve suggest that the formation of the sand ridges was favoured during a period of deceleration of sea-level rise, such as during the Younger Dryas event. The dunes are part of a "mobile carpet" (here U160). The deposition of this marine sand veneer is possibly related to the interplay between different factors that trigger the turning on/off for bottom currents sand deposition/transport on the outer shelf. In fact, the sands appear to have been reworked intermittently due to high-energy conditions in shallow water depth (currents, wave regime and wind-driven circulation) as well as they form current ridges superimposed to the transgressive deposits in the westernmost part of the studied area (at the Bourcart Canyon's head).	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/2006/publication-2321.pdf

http://archimer.ifremer.fr/doc/2006/sup-2321.pdf

DOI:10.1016/j.margeo.2006.09.010

http://archimer.ifremer.fr/doc/00000/2321/	
Editor: 	Elsevier	
Formato: 	application/pdf	
Fonte: 	Marine Geology (0025-3227) (Elsevier), 2006-12 , Vol. 234 , N. 1-4 , P. 93-109	
Fonte: 	2006 Elsevier B.V. All rights reserved

info:eu-repo/semantics/openAccess

restricted use