GPH 111 Study Guide - Final Guide: Phreatomagmatic Eruption, Oceanic Crust, Subduction

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30 Oct 2014
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Know what a tsunami is, and how it differs from a regular wind- generated wave: tsunami- harbor waves or seismic sea waves most often caused by ocean-floor earthquakes, dense oceanic plate sinks in subduction plate and strain. The locked area ruptures, releasing energy in an earthquake, that is why a tsunami is different than a wind-generated wave. Review the evidence of past tsunamis that scientists have found along the pacific northwest: the layers in the ground indicated a tsunami had come by. Centuries after the earthquakes the ground layers from bottom up went: peat marsh soil topped with tsunami sand topped with tidal mud. Know the tectonic environment that generated the 2004 indian. Ocean tsunami, and why it took so many lives: many poorly enforced buildings that can collapse, the sudden rise of the ocean floor caused tsunamis sent to all surrounding countries.