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High-resolution onshore-offshore morpho-bathymetric records of modern chalk and granitic shore platforms in NW France
Duperret, A.; Raimbault, C.; Le Gall, B.; Authemayou, C.; Van Vliet-Lanoë, B.; Regard, V.; Dromelet, E.; Vandycke, S. (2016). High-resolution onshore-offshore morpho-bathymetric records of modern chalk and granitic shore platforms in NW France. C. r. Géosci. 348(6): 422-431. https://dx.doi.org/10.1016/j.crte.2015.06.005
In: Comptes Rendus. Geoscience. Elsevier: Paris. ISSN 1631-0713; e-ISSN 1778-7025, meer
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| Author keywords |
Rocky coast; Shore platform; Shoreline; Land-sea DEM; Holocene;Bathymetry; Tectonics |
| Auteurs | | Top |
- Duperret, A.
- Raimbault, C.
- Le Gall, B.
- Authemayou, C.
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- Van Vliet-Lanoë, B.
- Regard, V.
- Dromelet, E., meer
- Vandycke, S.
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| Abstract |
Modern shore platforms developed on rocky coasts are key areas for understanding coastal erosion processes during the Holocene. This contribution offers a detailed picture of two contrasted shore-platform systems, based on new high-resolution shallow-water bathymetry, further coupled with aerial LiDAR topography. Merged land-sea digital elevation models were achieved on two distinct types of rocky coasts along the eastern English Channel in France (Picardy and Upper-Normandy: PUN) and in a NE Atlantic area (SW Brittany: SWB) in NW France. About the PUN case, submarine steps, identified as paleo-shorelines, parallel the actual coastline. Coastal erosive processes appear to be continuous and regular through time, since mid-Holocene at least. In SWB, there is a discrepancy between contemporary coastline orientation and a continuous step extending from inland to offshore, identified as a paleo-shoreline. This illustrates a polyphased and inherited shore platform edification, mainly controlled by tectonic processes. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
