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continental drift

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Subject: 
Environmental Science
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Tags: 
geology
Plate Tectonics
Structure of the Earth
Asthenosphere
lithosphere
Crust
Tectonics
Mantle
Divergent boundary
Submarine earthquake

Turner Burwick 12/2/2009 Period 7 Vocabulary Continental drift - the lateral movement of continents resulting from the motion of crustal plates. Pangaea - The landmass that existed when all continents were joined, from about 300 to 200 million years ago. Seafloor spreading - a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out. Plate tectonics - a theory of global tectonics in which the lithosphere is divided into a number of crustal plates, each of which moves on the plastic asthenosphere more or less independently to collide with, slide under, or move past adjacent plates.

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