Limitations to U/Th dating of reef-platform carbonate boulders produced by high-energy marine inundations in the Tuamotu Archipelago (French Polynesia)

Remy, Canavesio; Pons‐Branchu, Edwige; Chancerelle, Yannick

doi:10.1007/s00338-018-1732-8

Cited by 5 publications

(2 citation statements)

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“…The chronology of onshore boulder movement by waves can be obtained with radiocarbon ages of biogenic calcium carbonate attached to or beneath boulders (Costa et al, 2011;Hall et al, 2006;Jones and Hunter, 1992;Mastronuzzi et al, 2007;Nott, 1997Nott, , 2000Rixhon et al, 2018;Scheffers et al, 2009;Schneider et al, 2019;Suzuki et al, 2008) by electron spin resonance dating of coral boulders (Scheffers et al, 2014) and by uranium-series radiometric age dating (Remy et al, 2018;Scheffers et al, 2014;Terry et al, 2016). Moreover, optically stimulated luminesce (OSL) dating of sand has been used to constrict the age of boulder deposition (Hall et al, 2006;Kennedy et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Estimating the age and mechanism of boulder transport related with extreme waves using lichenometry

Oliveira

Llop

Andrade

et al. 2020

Progress in Physical Geography: Earth and Environment

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Tsunamis and storms cause considerable coastal flooding, numerous fatalities, destruction of structures, and erosion. The characterization of energy and frequency associated with each wave contribute to the risk assessment in coastal regions. Coastal boulder deposits represent a physical proof of extreme inundation and allow us to study the effects of marine floods further back in time than instrumental and historical records. Age estimation of these deposits is challenging due to lack of materials (such as sand, shells, corals, or organic matter) that retain information about the passage of time. Lichenometry, a simple age estimation method, which is cost-effective, quick to apply, and non-destructive, is here proposed as a solution. A lichen growth model for a calcium-tolerant lichen species was developed and used to estimate the age of a boulder deposit related to extreme marine inundation(s) in Portugal. Estimated ages indicate several very recent events (<700 years) for most of the boulders’ stabilization and agree with results obtained with optically stimulated luminescence of marine sands found beneath boulders. Frequent and recent boulder transport implies a storm-origin for this deposit. These conclusions contrast with other works describing identical deposits that are attributed to paleotsunamis. This study presents a methodology using lichenometry as a successful alternative for age estimation in rocky coastal settings. These results offer an alternative explanation for coastal boulder deposits found on the west coast of Portugal.

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Section: Introductionmentioning

confidence: 99%

“…boulders (Scheffers et a., 2014) and by uranium-series radiometric age dating (Scheffers et al,52 2014; Terry et al, 2016;Remy et al, 2018). Moreover, optically stimulated luminesce (OSL) 53 dating of sand has been used to constrict the age of boulder deposition (Hall et al, 2006;Kennedy 54 et al, 2007).…”

mentioning

confidence: 99%