PlateTectonics2 - Plate Tectonics 2 Plate Iceland is being...

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Plate Tectonics 2 Plate Tectonics 2 Iceland is Iceland is being pulled being pulled apart as it sits apart as it sits astride the Mid- astride the Mid- Atlantic Ridge. Atlantic Ridge.
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Plate Tectonic Theory Explains Plate Tectonic Theory Explains Age and origin of ocean crust. Distribution of earthquakes and volcanoes. Location and age of mountain belts.
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Plate Tectonics Plate Tectonics lithosphere lithosphere: earth’s outer rigid, cooler shell 100-150 km thick Plates composed of this material Crust and uppermost mantle asthenosphere asthenosphere: part of mantle beneath lithosphere that is hotter, capable of flow Found 150-350 km beneath surface
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Driving Driving Mechanism Mechanism Thermal convection (heat flow) in mantle. Heat produced by decay of radioactive minerals.
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Types of Plate Boundaries Types of Plate Boundaries divergent : plates move apart; mid-ocean ridges convergent : collision zones; plates come together transform fault : plates slide past each other
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Three Types of Plate Boundaries
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Divergent Plate Boundary Divergent Plate Boundary 1) usually begin within continent 2) grows to become ocean basin
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W. W. Norton
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Rifting Begins Within Continent Rifting Begins Within Continent
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PlateTectonics2 - Plate Tectonics 2 Plate Iceland is being...

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