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- W3103757144 endingPage "279" @default.
- W3103757144 startingPage "255" @default.
- W3103757144 abstract "Landslide deposits offshore many volcanic islands provide evidence of catastrophic lateral collapses. These deposits span a larger volume range than their continental equivalents, and can generate devastating tsunamis. All historical volcanic-island lateral collapses have occurred in arc settings, and have been characterised by rapid failure and efficient tsunami generation. The varied morphology of their deposits is influenced both by lithological properties and the nature of the substrate. Many deposits show evidence of extensive seafloor erosion and transformation into debris flows, and the propagation of frontally-confined sediment deformation beyond and beneath the primary deposit. Mobilised volumes can far exceed that of the initial failure, and accurate deposit interpretation requires internal geophysical imaging and sampling. Around intraplate ocean-island volcanoes, multi-unit turbidites suggest that lateral collapses may occur in discrete stages; although this would reduce their overall tsunamigenic potential, the volumes of individual stages of collapse remain very large. Numerical models of both landslide and tsunami processes in ocean-island settings are difficult to test, and the smaller collapses that typify island arcs are an important focus of research due to their higher global frequency, availability of direct failure and tsunami observations, and a need to better understand the signals of incipient collapse to develop approaches for tsunami hazard mitigation." @default.
- W3103757144 created "2020-11-23" @default.
- W3103757144 creator A5024853091 @default.
- W3103757144 creator A5049410638 @default.
- W3103757144 creator A5066072262 @default.
- W3103757144 date "2020-11-17" @default.
- W3103757144 modified "2023-10-12" @default.
- W3103757144 title "Volcanic-Island Lateral Collapses and Their Submarine Deposits" @default.
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