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Reconstructing the recent failure chronology of a multistage landslide complex using cosmogenic isotope concentrations: St Catherine's Point, UK
journal contribution
posted on 2023-06-09, 01:42 authored by John BarlowJohn Barlow, Roger Moore, Delia M GheorghiuThe pre-existing multistage landslide complex at St Catherine’s Point comprises a series of large rotational and translational failures that form the western section of the Isle of Wight Undercliff, UK. Cosmogenic beryllium and aluminum concentrations extracted from chert samples of the Upper Greensand are used to date the most recent sequential failure events. We use our understanding of the failure mechanics and landslide geomorphology to produce a cosmogenic exposure model that incorporates pre-failure topography into our shielding calculations. This method allowed us to date two successive landslides at the site using 10Be, the most recent of which occurred ~1064 ± 348 (± 1 s) 10Be years ago, much more recently than was previously thought. An earlier failure event is dated at ~3471 ± 348 10Be years, supporting the hypothesis that the St Catherine’s Point landslide complex was reactivated by relative sea-level rise at the end of the Holocene Climatic Optimum period.
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Publication status
- Published
File Version
- Accepted version
Journal
GeomorphologyISSN
0169-555XPublisher
ElsevierExternal DOI
Volume
268Page range
288-295Department affiliated with
- Geography Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2016-06-16First Open Access (FOA) Date
2017-06-16First Compliant Deposit (FCD) Date
2016-06-16Usage metrics
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