The study also provides a new approach to solving one of the biggest enduring scientific mysteries: when did plate tectonics begin?
Articles on Plate tectonic theory
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Iceland’s volcanic activity is generally tame compared with explosive eruptions along the Pacific’s Ring of Fire. This time, it’s shaking up a town.
A deadly earthquake in Afghanistan, following one in Morocco, highlights the risks in the region.
Scientists were not previously certain how the precious stones arrived at the Earth’s surface.
Starting at the surface, you would have to dig nearly 2,000 miles before reaching the Earth’s core. No one could survive that trip – and the 10,000-degree F heat once there would vaporize you anyway.
Born on July 30, 1920, geologist and cartographer Tharp changed scientific thinking about what lay at the bottom of the ocean – not a featureless flat, but rugged and varied terrain.
Top contributors
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Professor of Geology, West Virginia University
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Associate Professor of Earth and Planetary Sciences, University of Tennessee
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Professor in Earth & Climate Science, University of Southampton
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Harold T. Stearns Professor of Earth Science, Wesleyan University
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Professor, School of Natural Sciences, Macquarie University