Plate Tectonics

Plate Tectonics - Plate Tectonics Plate A Unifying Theory...

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Plate Tectonics Plate Tectonics A Unifying Theory Responsible for Mtn. Building, Earthquakes, Volcanism, and Seafloor Spreading Rigid plates of lithosphere slide over “plastic” layer of the asthenosphere
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Position of the continents over the past 750 million years Plate Tectonics Animation
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Earths lithosphere is broken into about 12 major plates Also on page 26 in your manual
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Plates move over the partially molten asthenosphere. There are 3 types of plate boundaries: Divergent Boundaries - plates move away from each other Convergent Boundaries - plates move towards one another Transform Boundaries - plates slide past each other
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Divergent Boundaries As plates move away from each other, partially molten lava rises and is added onto the edge of the plates. This process is responsible for the formation of oceanic crust.
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Development of an ocean basin along a divergent plate margin
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Convergent Boundaries Plates move toward one another and can either result in subduction or collision. Subduction
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This note was uploaded on 10/23/2011 for the course GLY 1000 taught by Professor Parker during the Spring '11 term at FSU.

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Plate Tectonics - Plate Tectonics Plate A Unifying Theory...

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