Estimating the age and mechanism of boulder transport related with extreme waves using lichenometry
| Autor: | Cristina Branquinho, César Andrade, Maria da Conceição Freitas, Ronald J. Goble, Maria Alexandra Oliveira, Esteve Llop, Pedro Pinho, Sónia Queiroz |
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| Přispěvatelé: | Repositório da Universidade de Lisboa |
| Rok vydání: | 2020 |
| Předmět: |
010506 paleontology
Portugal 010504 meteorology & atmospheric sciences Geography Planning and Development Rocky coastline Storm Atmospheric sciences 01 natural sciences Lichenometry 13. Climate action frequency parasitic diseases Earth and Planetary Sciences (miscellaneous) Erosion General Earth and Planetary Sciences optically stimulated luminescence 14. Life underwater Rogue wave Coastal flood limestone Geology 0105 earth and related environmental sciences |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 1477-0296 0309-1333 |
| Popis: | 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 ( |
| Databáze: | OpenAIRE |
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