LeHavreV1, Hal, Corpus, bibRecord, 000157

High-resolution onshore–offshore morpho-bathymetric records of modern chalk and granitic shore platforms in NW France

Identifieur interne : 000157 ( Hal/Corpus ); précédent : 000156; suivant : 000158

High-resolution onshore–offshore morpho-bathymetric records of modern chalk and granitic shore platforms in NW France

Auteurs : Anne Duperret ; Céline Raimbault ; Bernard Le Gall ; Christine Authemayou ; Brigitte Van Vliet-Lanoë ; Vincent Regard ; Elsa Dromelet ; Sara Vandycke

Source :

Comptes Rendus Géoscience [ 1631-0713 ] ; 2015-07.

RBID : Hal:insu-01185350

English descriptors

mix :
- Bathymetry, Holocene, Land-sea DEM, Rocky coast, Shore platform, Shoreline, Tectonics.

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.

Url:

https://hal-insu.archives-ouvertes.fr/insu-01185350

DOI: 10.1016/j.crte.2015.06.005

Links to Exploration step

Hal:insu-01185350

Le document en format XML

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High-resolution onshore–offshore morpho-bathymetric records of modern chalk and granitic shore platforms in NW France

High-resolution onshore–offshore morpho-bathymetric records of modern chalk and granitic shore platforms in NW France

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