Deep Below North America

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Science  09 Nov 2001:
Vol. 294, Issue 5545, pp. 1297-1298
DOI: 10.1126/science.1066319

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Plate tectonics is the dominant process behind the creation and decomposition of the crust and the uppermost part of Earth's mantle (the lithosphere). Did plate tectonic processes also operate on the early Earth? In her Perspective, van der Lee reviews the evidence from Laurentia, the predecessor of the North American continent.