Tsunami or storm deposit? A late Holocene sedimentary record from Swamp Bay, Rangitoto ki te Tonga/D’Urville Island, Aotearoa–New Zealand

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dc.citation.issue4
dc.citation.volume66
dc.contributor.authorKing DN
dc.contributor.authorClark K
dc.contributor.authorChagué C
dc.contributor.authorLi X
dc.contributor.authorLane E
dc.contributor.authorMcFadgen BG
dc.contributor.authorHippolite J
dc.contributor.authorMeihana P
dc.contributor.authorWilson B
dc.contributor.authorDobson J
dc.contributor.authorGeiger P
dc.contributor.authorRobb H
dc.contributor.authorHikuroa D
dc.contributor.authorWilliams S
dc.contributor.authorMorgenstern R
dc.contributor.authorScheele F
dc.date.accessioned2024-05-23T22:56:40Z
dc.date.available2024-05-23T22:56:40Z
dc.date.issued2023
dc.description.abstractInformed by Māori oral histories that refer to past catastrophic marine inundations, multi-proxy analysis of stratigraphic records from Swamp Bay, Rangitoto ki te Tonga (D’Urville Island) shows evidence of an anomalous deposit extending some 160 m inland. The deposit includes two distinct lithofacies. The lower sand unit is inferred to have been transported from the marine environment, with corresponding increases in the percentages of benthic marine and brackish–marine diatoms, and geochemical properties indicative of sudden changes in environmental conditions. Radiocarbon dating indicates the deposit formation is less than 402 yrs BP, and pollen indicates it is unlikely to be younger than 1870 CE. Core stratigraphy age models and co-seismic chronologies point to the marine unit most likely being emplaced by tsunami transport associated with rupture of the Wairarapa Fault in 1855 CE. The overlying unit of gravel and silt is inferred to be fluvial deposit and slope-wash from the surrounding hills, loosened by ground-shaking following the earthquake. These findings indicate the 1855 CE earthquake may have been more complex than previously thought and, or, available tsunami modelling does not fully capture the local complexities in bathymetry and topography that can cause hazardous and localized tsunami amplification in embayments like Swamp Bay.
dc.description.confidentialfalse
dc.edition.edition2023
dc.format.pagination629-645
dc.identifier.citationKing DN, Clark K, Chagué C, Li X, Lane E, McFadgen BG, Hippolite J, Meihana P, Wilson B, Dobson J, Geiger P, Robb H, Hikuroa D, Williams S, Morgenstern R, Scheele F. (2023). Tsunami or storm deposit? A late Holocene sedimentary record from Swamp Bay, Rangitoto ki te Tonga/D’Urville Island, Aotearoa–New Zealand. New Zealand Journal of Geology and Geophysics. 66. 4. (pp. 629-645).
dc.identifier.doi10.1080/00288306.2022.2087692
dc.identifier.eissn1175-8791
dc.identifier.elements-typejournal-article
dc.identifier.issn0028-8306
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69653
dc.languageEnglish
dc.publisherTaylor and Francis Group
dc.publisher.urihttps://www.tandfonline.com/doi/full/10.1080/00288306.2022.2087692
dc.relation.isPartOfNew Zealand Journal of Geology and Geophysics
dc.rights(c) 2022 The Author/s
dc.rightsCC BY-NC-ND 4.0
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectMāori
dc.subjecttsunami
dc.subjectearthquake
dc.subjectsedimentology
dc.subjectmicrofossils
dc.subjectgeochemistry
dc.subjectRangitoto kite Tonga
dc.subjectD’Urville Island
dc.subjectRaukawa Moana
dc.subjectCook Strait
dc.titleTsunami or storm deposit? A late Holocene sedimentary record from Swamp Bay, Rangitoto ki te Tonga/D’Urville Island, Aotearoa–New Zealand
dc.typeJournal article
pubs.elements-id454618
pubs.organisational-groupOther
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