FN Archimer Export Format
PT J
TI Axial incision: The key to understand submarine canyon evolution (in the western Gulf of Lion)
BT 
AF BAZTAN, Juan
   BERNE, Serge
   OLIVET, Jean-Louis
   RABINEAU, Marina
   ASLANIAN, Daniel
   GAUDIN, Mathieu
   REHAULT, Jean Pierre
   CANALS, M
AS 1:1,2;2:2;3:2;4:2,5;5:2;6:2,3;7:1,2;8:4;
FF 1:;2:PDG-DOP-DCB-GM-LES;3:PDG-DOP-DCB-GM-LGG;4:;5:PDG-DOP-DCB-GM-LGG;6:PDG-DOP-DCB-GM-LES;7:;8:;
C1 Univ Bretagne Occidentale, UMR 6538, IUEM Domaines Ocean, F-29280 Plouzane, France.
   IFREMER, DRO GM, F-29280 Plouzane, France.
   Univ Bordeaux 1, Dept Geol & Oceanog, UMR 5805, F-33405 Talence, France.
   Univ Barcelona, GRC Geosci Marines, Barcelona S-08028, France.
C2 UBO, FRANCE
   IFREMER, FRANCE
   UNIV BORDEAUX, FRANCE
   UNIV BARCELONA, FRANCE
   CNRS, FRANCE
SI BREST
SE PDG-DOP-DCB-GM-LES
   PDG-DOP-DCB-GM-LGG
   PDG-DOP-DCB-GM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.255
TC 101
TU Centre national de la recherche scientifique
   Institut de recherche pour le développement
   Institut français de recherche pour l'exploitation de la mer
   Service Hydrographique et Océanographique de la Marine
   Université de Bordeaux
   Université de Bretagne Occidentale
   Université de Bretagne-Sud
   École pratique des hautes études
UR https://archimer.ifremer.fr/doc/2005/publication-353.pdf
LA English
DT Article
CR BASAR 2
   CALMAR97
   CALMAR99
   MARION
   STRATAFORM 1
BO L'Europe
   L'Atalante
   Le Suroît
DE ;submarine canyon;axial incision;Gulf of Lion
AB A detailed morphological analysis of the outer shelf and continental slope of the Western Gulf of Lion is presented, based on swath bathymetry data together with sub-bottom profiles and high resolution seismic reflection profiles. These data reveal two main erosive features, of very different dimensions: the axial incision and the canyon's major valley. The height of axial incisions' flanks with respect to the canyon deepest point (the thalweg) ranges from 40 to 150 m. It creates a small axial erosive path within the canyon's major valley, which is typically bounded by flanks of more than 700 m in height. We interpret the axial incision observed in the sea floor as the imprint of turbidity currents that eroded the floor of canyons during phases of connection to rivers (hyperpycnal turbidity current). Such currents are most likely to have formed during the Last Glacial Maximum (LGM) as both proximity of the shoreline (due to the lowstand of sea level) and high detrital sediment supply (due to glacial abrasion upstream) increased the flow of sediments delivered to the canyon heads. Fossil axial incisions, observed in seismic lines, are related to equivalent conditions. The axial incision, however, has a key influence on canyon evolution as it triggers mass wasting of different sizes that affect the canyon's major valley (head and flanks). We interpret the geometry of the canyon's major valley as the result of recurrent activity of axial incisions. These periods of activity occurred during low sea levels at glacial maxima and show a cyclicity of 100,000 years for the last 400,000 years.
PY 2005
PD JUL
SO Marine And Petroleum Geology
SN 0264-8172
PU Elsevier Sci Ltd
VL 22
IS 6-7
UT 000232437500007
BP 805
EP 826
DI 10.1016/j.marpetgeo.2005.03.011
ID 353
ER

EF