FN Archimer Export Format
PT J
TI Instabilities and deformation in the sedimentary cover on the upper slope of the southern Aquitaine continental margin, north of the Capbreton canyon (Bay of Biscay)
BT 
AF GONTHIER, E
   CIRAC, P
   FAUGERES, J
   GAUDIN, Mathieu
   CREMER, M
   BOURILLET, Jean-Francois
AS 1:1;2:1;3:1;4:1;5:1;6:2;
FF 1:;2:;3:;4:PDG-DOP-DCB-GM-LES;5:;6:PDG-DOP-DCB-GM-LES;
C1 Univ Bordeaux 1, CNRS, Dept Geol & Oceanog, UMR 5805,EPOC, F-33405 Talence, France.
   IFREMER, DRO GM, F-29280 Plouzane, France.
C2 UNIV BORDEAUX, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-DOP-DCB-GM-LES
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.005
TC 11
TU Centre national de la recherche scientifique
   Université de Bordeaux
   École pratique des hautes études
UR https://archimer.ifremer.fr/doc/2006/publication-3960.pdf
LA English
DT Article
CR ITSAS II
   OXYBENT 97
   OXYBENT 98
   OXYBENT 99
BO Le Suroît
   Côtes De La Manche
DE ;Sediment transfer;Mass flows;Sediment wave;Continental slope;Canyon;Bay of Biscay
AB Acoustic and core data have recently been collected on the shelf break and the upper part of the slope of the south Aquitaine continental margin. They reveal the major role played by mass-flow gravity processes in deposit erosion and redistribution, modelling of the sea-bed, and transfer of sediment toward the deep-sea. The study region is bounded in the south by the Capbreton canyon. The northern area, which shows a smooth morphology, is characterised by small-scale deformations due to sediment creep or low-amplitude slide processes. The deformations are associated with mini listric-like faults that bound packets of sediments in which the deposit geometry is typical of constructional sediment waves. These sediment waves result from the interaction of depositional and gravity deformation processes. In the southern area, closer to the canyon, wave-like structures are still present but mostly of smaller size. They only result from gravity deformation processes without any evidence of constructional processes. In the vicinity of the Capbreton canyon, the shelf break and upper slope have a much more uneven morphology with sedimentary reliefs, escarpments and depressions directed toward the canyon thalweg. The depressions look like slide scars, and could be the result of regressive slides initiated at the top of the canyon flank. The age of the sliding event responsible for the formation of the depression observed today could be middle to upper Quaternary. Since their formation, these depressions act as conduits that channel the transfer of shelf sediment into the canyon, as demonstrated by the occurrence of a meandering channel on the sea-floor of one depression.
PY 2006
PD JUL
SO Scientia Marina
SN 0214-8358
PU Institut de Ciències del Mar de Barcelona, CSIC
VL 70
IS 1
UT 000238460400008
BP 89
EP 100
ID 3960
ER

EF