EOSC 114 Study Guide - Seismic Wave, Subduction, Elastic-Rebound Theory
15 Apr 2013
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Document Summary
Earth surface consists of a number of lithosphere plates that include both the crust and upper mantle. These plates are moving around and they interact with each other. Plate fault happen at the interactions points of two lithospheres. Plates are block of lithosphere floating on ductile asthenosphere. Convergent boundaries (plates moving toward one another: stress can build up in large amounts and cause massive earthquakes, the places where the two plates meet is the subduction zone, where earth quakes happen. Transform boundaries (plates sliding along one another) Movement for plates at ridges is propelled by sliding along the elevated lithosphere-asthenopshere boundary (divergent margin) Slap pull: dense, subducting lithosphere pulls" the plate along with it (converging margin) Different types of stress stress is the force (n) applied per unit of areas (m^2) stress is measure as n/m^2, also known as pascals (pa). Shear (next to each other in different directions)
