Seismoturbidite record as preserved at core sites at the Cascadia and Sumatra-Andaman subduction zones

J. R. Patton, C. Goldfinger, A. E. Morey, C. Romsos, B. Black, Y. Djadjadihardja, Udrekh

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Turbidite deposition along slope and trench settings is evaluated for the Cascadia and Sumatra-Andaman subduction zones. Source proximity, basin effects, turbidity current flow path, temporal and spatial earthquake rupture, hydrodynamics, and topography all likely play roles in the deposition of the turbidites as evidenced by the vertical structure of the final deposits. Channel systems tend to promote low-frequency components of the content of the current over longer distances, while more proximal slope basins and base-of-slope apron fan settings result in a turbidite structure that is likely influenced by local physiography and other factors. Cascadia's margin is dominated by glacial cycle constructed pathways which promote turbidity current flows for large distances. Sumatra margin pathways do not inherit these antecedent sedimentary systems, so turbidity currents are more localized.

Original languageEnglish (US)
Pages (from-to)833-867
Number of pages35
JournalNatural Hazards and Earth System Science
Volume13
Issue number4
DOIs
StatePublished - 2013
Externally publishedYes

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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