FN Archimer Export Format
PT C
TI Morphological and internal variability of sand banks on a macro tidal dispersive shelf
BT 
AF DAGUINOS, Paul
   LE ROY, Pascal
   MENIER, David
   LE DANTEC, Nicolas
   EHRHOLD, Axel
   JOUET, Gwenael
   FRANZETTI, Marcaurelio
AS 1:1;2:1;3:2;4:;5:3;6:3;7:1;
FF 1:;2:;3:;4:;5:PDG-REM-GEOOCEAN-ASTRE;6:PDG-REM-GEOOCEAN-ASTRE;7:;
C1 UMR 6538 GEO-OCEAN, UBO, UBS, CNRS, Ifremer, 29280 Plouzane, France
   UMR 6538 GEO-OCEAN, UBO, UBS, CNRS, Ifremer, 56017 Vannes, France
   UMR 6538 GEO-OCEAN, UBO, UBS, CNRS, Ifremer, 29280 Plouzane, France
C2 UBO, FRANCE
   UBS, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-REM-GEOOCEANPDG-REM-GEOOCEAN-ASTRE
   PDG-REM-GEOOCEAN-ASTRE
   UMR-LGO
UM GEO-OCEAN
UR https://archimer.ifremer.fr/doc/00858/96979/105661.pdf
LA English
DT Proceedings paper
CR BANKABLE
   GEOBREST
   GEOBREST 2011
   GEOBREST 2012
   GEOBREST 2013
   GEOBREST 2014
   GEOBREST 2019
   SABASETI
   SISPLATEAU
   SPEEDUNES
BO Côtes De La Manche
   Thalia
AB We investigated the morphological and architectural variability of four sandbanks, from the same area, at intermediate depths (from 50 to 120m) along the continental shelf of Western Brittany (France) in the Iroise Sea, a dispersive shelf exposed to large storms. In order to identify the parameters controlling the variability of sandbanks morphologies and architectures, we analyzed geophysical data (seismic, reflectivity and bathymetry) from several oceanographic cruises. Preliminary results reveal internal architectures composed of 4 to 5 seismic units for each bank. They are interpreted as controlled by the stepwise flooding of the Armorican basement shelf during the last transgression. This igneous basement that outcrops on the seafloor up to 100m deep has constrained local tidal circulation and swell exposure during the progressive flooding of the shelf, which explains the very contrasting morphologies and internal architectures of these coeval banks on the Iroise Sea shelf. 
PY 2023
PD APR
CT Valance, A., Garlan, T., Crave A., and Gangloff, A. (Eds), 2023. MARID VII. Seventh International Conference on Marine and River Dune Dynamics. Rennes, France, 3-5 April 2023. University of Rennes 1 and Shom. pp.69-73
ID 96979
ER

EF