PLATETECT - The Big Picture: Whats It All About? Heat...

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The Big Picture: What’s It All About? Heat Engines/Drivers Structure of the Earth, Plate Tectonics, and Hot Spots
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How do we know what the interior of the Earth is like? We use many ”tools” to see inside the Earth GRAVITY HEAT FLOW MAGNETICS EARTHQUAKES THE MOST IMPORTANT IS …
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Earthquakes! Generated when rocks break Earthquake waves move through the earth and their character changes as they do so Waves can be thought of as very loud, low frequency sounds produced by the fracturing of brittle rock
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Two Types of Seismic Waves P ressure Waves - fast moving motion is in same direction as the wave moves through both solids and fluids S hear waves - slow moving motion is perpendicular to wave direction can only move through solids
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Refraction Reflection Refraction and Reflection of a Beam of Light
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Paths of earthquake waves
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Earthquake wave velocities in the Earth’s Interior Structure of the interior of the Earth derived from earthquake wave velocities
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Detailed structure of the Earth physical lithologic
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Structure of the Crust and Upper Mantle
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Plate Tectonics Theory says: The lithosphere of the earth is broken into large sections called plates These plates move relative to each other and to the underlying asthenosphere Interactions between moving plates cause earthquakes , volcanism , and pretty much most of the major features on the Earth’s surface
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This note was uploaded on 04/20/2011 for the course GG 103 taught by Professor Herrero-bervera during the Summer '10 term at University of Hawaii, Manoa.

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PLATETECT - The Big Picture: Whats It All About? Heat...

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