Forskning ved Københavns Universitet - Københavns Universitet

Forside

Holocene formation and evolution of coastal dunes ridges, Brittany (France)

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

Dokumenter

  • Brigitte Van Vliet-Lanoë
  • Jérôme Goslin
  • Alain Hénaff
  • Bernard Hallégouët
  • Christophe Delacourt
  • Erwan Le Cornec
  • Murielle Meurisse-Fort

Holocene coastal dune formation under a continuously rising sea level (SL) is an abnormal response to increasing storm frequency. The aim of this work is to understand the coastal sedimentary budget and the present-day sand starvation, controlled by climate and man. Dating in Brittany shows that Aeolian deposition initiated from ca. 4000 cal BP, with the slowing down of the SL rise. Pre-historical dunes appeared here from ca. 3000 cal BP, without SL regression. After, further building phases recycled the same stock of sands. Historical dunes I developed from ca. 350 AD. Major storms between 900 and 1200 AD resulted in the construction of washover coastal ridges, the Historical dunes II. A part of the sand was evacuated offshore. From ca. 1350 AD, the pre-existing ridges are reworked forming the Historical dunes III, leading to rapid coastal erosion and inland drift. Holocene dunes with a rising SL constitute a temporary anomaly, mostly forced by man, soon erased by storms in Brittany.

OriginalsprogEngelsk
TidsskriftComptes Rendus - Geoscience
Vol/bind348
Udgave nummer6
Sider (fra-til)462-470
Antal sider9
ISSN1631-0713
DOI
StatusUdgivet - 2016

Antal downloads er baseret på statistik fra Google Scholar og www.ku.dk


Ingen data tilgængelig

ID: 199962408