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Encyclopediaplate tectonicsplate tectonics, theory that unifies many of the features and characteristics of continental drift and seafloor spreading into a coherent model and has revolutionized geologists' understanding of continents, ocean basins, mountains, and earth history. Sections in this article: The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved. More on plate tectonics from Infoplease:
- plate tectonics: meaning and definitions - plate tectonics: Definition and Pronunciation
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