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Lecture 3

Earth Science - Lecture 3 Notes.docx

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Department
Earth Sciences
Course
EARTHSC 2GG3
Professor
Sergei Basik
Semester
Fall

Description
Lecture 3 September 11, 2013 Earth Structure, Tectonic Plates and Continental Drift Theory Earth Structure  Layers of the Earth (based on composition): o Core o Mantle: main part, thick shell o Crust  Layers of Earth (based on rock rigidity/strength): o Lithosphere: crust and upper mantle o Asthenosphere  Different types of crust: o Continental crust: thicker o Oceanic crust: denser Continental Drift Theory  Alfred L. Wegener  “Pan” – all  “Gaea” – Earth  Evidence of continental drift: o Continents look like they once fit together o Mountains and rock structures are on different continents because they were once one o Fossils of animals/plants of the same age in different parts of the world Development of a Theory  Ocean floor mappi
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