GEO 104 Lecture Notes - Lecture 3: Thrust Fault, Elastic-Rebound Theory, Convergent Boundary
27 Sep 2017
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Document Summary
Refresher from last week: rocks are deformed by tectonic forces, rocks respond by elastic deformation and store energy, earthquakes result from brittle failure followed by elastic rebound a the rocks try to spring back into place. Earthquakes occur as deformed rock undergoes brittle failure and tries to spring back to its original shape. Foreshocks: unclear study since scientists are unsure if its a clear indicator an earthquake will occur. Most cases there is no direct link of foreshocks to big earthquakes. Aftershocks: many times there are little shocks after a big earthquake. This is where the movement along the fault plain exists. Epicenter: the location above the focus on the earth"s surface. Fault: fracture between two plates on the earth. They are classi ed by the direction of the rock"s motion (horizontal or vertical) Two types of dip slip faults: reverse fault(also known as thrust fault) and normal fault.
