Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 13, issue 1
Articles | Volume 13, issue 1
https://doi.org/10.5194/esurf-13-71-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-13-71-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 13, issue 1
Research article
 | 
20 Jan 2025
Research article |  | 20 Jan 2025

Evidence of slow millennial cliff retreat rates using cosmogenic nuclides in coastal colluvium

Rémi Bossis, Vincent Regard, Sébastien Carretier, and Sandrine Choy

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Short summary
The erosion of rocky coasts occurs episodically through wave action and landslides, constituting a major natural hazard. Documenting the factors that control the coastal retreat rate over millennia is fundamental to evidencing any change in time. However, the known rates to date are essentially representative of the last few decades. Here, we present a new method using the concentration of an isotope, 10Be, in sediment eroded from the cliff to quantify its retreat rate averaged over millennia. 
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