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Turbidite Event History—Methods and Implications for Holocene Paleoseismicity of the Cascadia Subduction Zone

AutorGoldfinger, Chris; Nelson, C. Hans ; Morey, Ann E.; Johnson, Joel E.; Patton, Jason; Karabanov, Eugene; Gutiérrez-Pastor, Julia; Ericsson, Andrew; Gràcia, Eulàlia ; Dunhill, Gita; Enkin, Randolph J.; Dallimore, Audrey; Vallier, Tracy
Fecha de publicación2012
EditorGeological Survey (U.S.)
CitaciónTurbidite Event History—Methods and Implications for Holocene Paleoseismicity of the Cascadia Subduction Zone : 1-170 (2012)
SerieProfessional Paper
1661–F
ResumenTurbidite systems along the continental margin of Cascadia Basin from Vancouver Island, Canada, to Cape Mendocino, California, United States, have been investigated with swath bathymetry; newly collected and archive piston, gravity, kasten, and box cores; and accelerator mass spectrometry radiocarbon dates. The purpose of this study is to test the applicability of the Holocene turbidite record as a paleoseismic record for the Cascadia subduction zone. The Cascadia Basin is an ideal place to develop a turbidite paleoseismologic method and to record paleoearthquakes because (1) a single subduction-zone fault underlies the Cascadia submarine-canyon systems; (2) multiple tributary canyons and a variety of turbidite systems and sedimentary sources exist to use in tests of synchronous turbidite triggering; (3) the Cascadia trench is completely sediment filled, allowing channel systems to trend seaward across the abyssal plain, rather than merging in the trench; (4) the continental shelf is wide, favoring disconnection of Holocene river systems from their largely Pleistocene canyons; and (5) excellent stratigraphic datums, including the Mazama ash and distinguishable sedimentological and faunal changes near the Pleistocene-Holocene boundary, are present for correlating events and anchoring the temporal framework. (...)
DescripciónAppendices. -- 170 pages, 64 figures, 13 tables.
Versión del editorhttp://pubs.usgs.gov/pp/pp1661f/
URIhttp://hdl.handle.net/10261/66386
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