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12 Cards in this Set
- Front
- Back
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Seafloor Spreading
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-oceanic crust being created by two continental crusts pulling away from each other.
ex. The Mid-Atlantic Ridge |
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Types of Boundaries
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Divergent- plates move apart and new lithosphere is created (plate area inc)
Convergent- plates come together and one is recycled back into the mantle (plate area dec) Transform fault- plates slide horizontally past each other |
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Examples of Boundaries
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Divergent- mid atlantic ridge, great rift valley
Convergent- himalayans, Andes, marianas Transform fault- San Andreas |
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Figure 2.10
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Magnetic mapping can measure the rate of seafloor spreading
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What is the engine that drives plate tectonics?
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The Mantle Convection and the energy that comes from Earth's internal heat.
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island arc
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volcanic islands
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volcanic arc
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volcanic areas on continents
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What drives the rock cycle?
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Internal Heat
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Minerals
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Calcite- reacts with acid
Quartz Gypsum Halite |
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Subduction
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oceanic creation is destroyed bc it subducts under the the continental crust creating new continental crust.
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Types of waves
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P waves- first, primary
S waves Can see refraction/reflection in waves |
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What features do you look for movement of plate tectonics?
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Volcanoes, mountains, trenches, faults
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