Reinterpretation of megatsunami inundation in Southeast Australia and the implications for palaeotsunami identification

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dc.contributor.authorCourtney, Cen_AU
dc.contributor.authorDominey-Howes, Den_AU
dc.contributor.authorGoff, JRen_AU
dc.contributor.authorChagué-Goff, Cen_AU
dc.date.accessioned2020-06-15T04:00:55Zen_AU
dc.date.available2020-06-15T04:00:55Zen_AU
dc.date.issued2011-12-05en_AU
dc.date.statistics2020-05-15en_AU
dc.description.abstractThe 2004 Indian Ocean tsunami resulted in a marked increase in concern regarding regions previously considered low risk of tsunami inundation. The southeast coast of Australia has a record suggesting low tsunami risk, with only 47 small tsunamis striking since European arrival. However, the controversial megatsunami hypothesis suggests patterns of massive inundation of the east Australian coast. Given the extreme vulnerability of the NSW coastline due to population concentration and the reliance on boulder deposit evidence, there is a need to provide thorough re-evaluation of the Australian tsunami risk. This re-examination has led to research at four back-beach locations on the south coast of New South Wales, located close to sites reported to contain evidence of megatsunami inundation. Analysis of stratigraphy, sediments, geochemistry and microfossils, plus an extensive radiocarbon chronology of these sites allows for a full reconstruction of the Holocene environments. This success highlights the importance of using multi-proxy diagnostic techniques in investigating potential tsunami inundation sites with relatively short historical records. In the case of NSW, no evidence of Holocene tsunamis has been identified, casting serious doubt on the existing understanding of tsunami risk on the NSW coast and the diagnostic criteria used for identifying tsunami deposits.en_AU
dc.identifier.citationCourtney, C., Dominey-Howes, D., Goff, J. R., & Chagué-Goff, C. (2011). Reinterpretation of megatsunami inundation in Southeast Australia and the implications for palaeotsunami identification. Paper presented at the American Geophysical Union Fall Meeting 2011, San Francisco, California, 5 December 2011 to 9 December 2011.en_AU
dc.identifier.conferenceenddate9 December 2011en_AU
dc.identifier.conferencenameAmerican Geophysical Union Fall Meeting 2011en_AU
dc.identifier.conferenceplaceSan Francisco, Californiaen_AU
dc.identifier.conferencestartdate5 December 2011en_AU
dc.identifier.govdoc9517en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/9669en_AU
dc.language.isoenen_AU
dc.publisherAmerican Geophysical Unionen_AU
dc.relation.ispartofseriesNH21D-1529;en_AU
dc.subjectIndian Oceanen_AU
dc.subjectTsunamisen_AU
dc.subjectAustraliaen_AU
dc.subjectCoastal regionsen_AU
dc.subjectHazardsen_AU
dc.subjectNatural disastersen_AU
dc.subjectNew South Walesen_AU
dc.subjectHypothesisen_AU
dc.subjectGeologic depositsen_AU
dc.subjectSedimentsen_AU
dc.subjectCarbon 14en_AU
dc.titleReinterpretation of megatsunami inundation in Southeast Australia and the implications for palaeotsunami identificationen_AU
dc.typeConference Abstracten_AU
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