Offshore evidence of historic and prehistoric tsunamis on the north shore of Tutuila (American Samoa)
| dc.rights.license | open | en_US |
| hal.structure.identifier | LIttoral ENvironnement et Sociétés [LIENSs] | |
| dc.contributor.author | RIOU, Brieuc | |
| hal.structure.identifier | LIttoral ENvironnement et Sociétés [LIENSs] | |
| dc.contributor.author | CHAUMILLON, Eric | |
| hal.structure.identifier | School of Biological, Earth and Environmental Sciences [Sydney] [BEES] | |
| dc.contributor.author | CHAGUÉ, Catherine | |
| hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
| dc.contributor.author | SCHMIDT, Sabine
IDREF: 131836129 | |
| hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
| dc.contributor.author | CORREGE, Thierry | |
| hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
| dc.contributor.author | BUJAN, Stephane | |
| hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
| dc.contributor.author | SCHNEIDER, Jean-Luc | |
| dc.date.accessioned | 2025-04-04T12:19:59Z | |
| dc.date.available | 2025-04-04T12:19:59Z | |
| dc.date.issued | 2024-01-05 | |
| dc.identifier.issn | 0037-0738 | en_US |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/205980 | |
| dc.description.abstractEn | Although research dealing with the geological evidence of past tsunamis has increased significantly in the last two decades, studies of tsunami deposits emplaced during the backwash phases are still underrepresented. Here, we provide the first investigation of tsunami backwash deposits all around an island (Tutuila Island, American Samoa), in the southwest of the Pacific Ring of Fire. We decipher the sedimentary record preserved offshore an open bay (Fagafue) and within a sheltered bay (Masefau) on the north shore of Tutuila. Backwash deposits of three historic tsunamis, namely the 2009 South Pacific, 1960 Valdivia and 1917 Tonga Trench tsunamis, were identified in sediment cores, based on sedimentological, geochemical and chronological data. Deposits were characterized by a geochemical terrestrial signature (Ti/Ca and K), while the grain size characteristics differed, being finer offshore the open bay and coarser within the sheltered bay. The 2009 South Pacific and the 1960 Valdivia tsunamis are recorded on both the north (Masefau and off Fagafue bays) and south (Pago Pago Bay) shores of Tutuila, providing the first correlation of tsunami backwash deposits all around an island. Furthermore, the present study presents the first geological evidence of backwash associated with a large 15-16th century tsunami, which also affected many parts of the South Pacific, as well as that of an older event between the 11th and 14th century. Studies of tsunami backwash deposits provide means to extend the geological record of these high energy events, due to the generally good preservation potential of the deposits. | |
| dc.language.iso | EN | en_US |
| dc.subject.en | Tsunami | |
| dc.subject.en | Backwash deposit | |
| dc.subject.en | Core correlation | |
| dc.subject.en | 15th century tsunami | |
| dc.subject.en | Evidence of local and far-field tsunamis | |
| dc.title.en | Offshore evidence of historic and prehistoric tsunamis on the north shore of Tutuila (American Samoa) | |
| dc.type | Article de revue | en_US |
| dc.identifier.doi | 10.1016/j.sedgeo.2023.106572 | en_US |
| dc.subject.hal | Sciences de l'environnement | en_US |
| dc.subject.hal | Planète et Univers [physics] | en_US |
| bordeaux.journal | Sedimentary Geology | en_US |
| bordeaux.page | 106572 | en_US |
| bordeaux.hal.laboratories | EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805 | en_US |
| bordeaux.institution | Université de Bordeaux | en_US |
| bordeaux.institution | CNRS | en_US |
| bordeaux.team | GEOLSED | en_US |
| bordeaux.peerReviewed | oui | en_US |
| bordeaux.inpress | non | en_US |
| bordeaux.import.source | hal | |
| hal.identifier | hal-04393934 | |
| hal.version | 1 | |
| hal.popular | non | en_US |
| hal.audience | Internationale | en_US |
| hal.export | false | |
| workflow.import.source | hal | |
| dc.rights.cc | Pas de Licence CC | en_US |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Sedimentary%20Geology&rft.date=2024-01-05&rft.spage=106572&rft.epage=106572&rft.eissn=0037-0738&rft.issn=0037-0738&rft.au=RIOU,%20Brieuc&CHAUMILLON,%20Eric&CHAGU%C3%89,%20Catherine&SCHMIDT,%20Sabine&CORREGE,%20Thierry&rft.genre=article |