plate tectonics
The Columbia Encyclopedia, Sixth Edition
plate 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. Development of Plate Tectonics Theory ...
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tectonics
Encyclopedia Britannica
Scientific study of the deformation of the rocks that make up the Earth's crust and the forces that produce such deformation. It deals with the folding and faulting associated with mountain building; the large-scale, gradual, upward and downward movements of the crust; and ...
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