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In most cases, these tests can separate earthquake-triggered turbidity currents from other possible sources. The northern events define a great earthquake recurrence of ~500–530 years.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.CS #16 *Notes regarding readings: All readings are in Stanley and Luczaj's Earth System History (4th edn), except for linked web pages and for numbers labeled "CS", which are numbers for stories in Creation Stories from around the World.Pages in brackets are suggested reading that may make lecture material easier to understand.
Archaeology is a combination of science and art with the purpose of learning about certain people or peoples through the careful analysis of remains.