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| Riou, Brieuc; Chaumillon, Eric; Schneider, Jean‐luc; Corrège, Thierry; Chagué, Catherine. |
| Extensive bathymetric and two‐dimensional seismic surveys have been carried out and cores collected in Pago Pago Bay (Tutuila, American Samoa) in order to describe and gain a better understanding of the sediment fill of the bay, which was affected by the 2009 South Pacific Tsunami. Eight sedimentary units were identified over the volcanic bedrock. The basal transgressive unit displays retrograding onlaps towards the shore, whereas the overlying seven aggradational layers alternate between four draping units and three pinching out seaward units. ‘Core to seismic’ correlation reveals that draping units are composed of homogeneous silts, while pinching out units are dominated by very coarse coral fragments showing fresh cuts, mixed with Halimeda plates. The... |
| Tipo: Text |
Palavras-chave: Core to seismic correlation; Holocene; Sediment bay-fill; Shallow marine tsunami deposits; Tectonic activity cycles; Tsunami. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00501/61231/76154.pdf |
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