Geob Lecture 5.docx

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Department
Geographical Biogeosciences
Course
GEOB 103
Professor
Carles Ferrer- Boix
Semester
Spring

Description
Geob Lecture 5 02/04/2014 Global Tectonics 1. Continental Drift – Plate tectonics 2. Evidences for rigid plates 3. Evidences for divergence boundaries Drift Theory 1 continent: Pangea. Based on geological evidence idea formed in the 1920’s Continents flow through oceans 1950’s Seismographs Sea­floor surveys Continents are like a passenger on a bigger plate, continents and ocean move together.  Plate Tectonics Continents are passengers Evidence for Rigid Plates Plates have a strong lithosphere and are moving back and forth  Deformation occurs in the boundaries and the interior remains undeformed More rigid ­> narrow bond (80%)
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