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Tectonics

CIVI 231 Geology for Civil Engineers

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9/10/2012 1 1 - 1 Tarbuck, Lutgens, Tsujita, Hicock, Earth: An Introduction to Physical Geology 3Ce Chapter 1: An Introduction to Geology and Plate Tectonics 1-2 The Science of Geology ? Geology ?geo? ? earth, ?logos? ? discourse ? Physical geology ? studies Earth materials; seeks to understand processes that operate on and beneath its surface ? Historical geology ? seeks to understand the origin of Earth and its development through time 9/10/2012 2 1-3 The Science of Geology ? Geology, people, and the environment ? Relationships between people and the natural environment include: ? Natural hazards, resources, world population growth, and environmental issues 1-4 The Science of Geology

Plate Tectonics

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Plate Tectonics .? Theory of how the continents moved apart ( Continental Drift) driven bySeafloor Spreading? .? Tectonics - important motions of Earth?s Crust .? Plates- Make up the crust Tectonic Plates . Crust made up of 12 or so plates study of movement/ formation of these plates Continental Drift .? Theory that all continents are moving across Earth?s surface Evidence: Fossils Glacial Striations/Grooves Rock deposits Jigsaw puzzle of Modern Continents Creation Of Continental Drift .? Alfred Wegener - 1912 .? Continents were together at one point ---> ? Pangea? -- ?All Earth? .? Over millions of years ---> continents split apart .? Wegener discredited because he was a? meteorologist and he could not explain a force for moving plates
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