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ONLY THE YEARS ARE CORRECT
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A Flemish mapmaker Abraham Ortelius noted that the coastlines appear to fit together.
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German meteorologist and geophysicist Alfred Wegner proposed that the continents were once joined in a supercontinent called Pangea.
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British geologist Arthur Holmes proposed that convection in the mantle is the force driving continental drift.
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Oceanic vessels mapping the ocean floor provided data on the topographic features of the ocean basin, leading to the discovery of mid-ocean ridges.
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American geophysicist Harry H. Hess developed the idea that oceanic crust forms along mid-ocean ridges and spreads out laterally away from the ridges.
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British geologists Frederick J. Vine and Drummond H. Mathews-as well as Canadian geophysicist Laurence W. Morley, who worked independently of the others-postulated that new crust would have a magnetization aligned with earths geomagnetic field.
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A global network of sensors designed to detect hydroacoustic signals was installed to monitor compliance with the Nuclear Test-Ban Treaty of 1963. The sensors also recorded earthquake activity.
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The vessel Glomar Challenger set sail on an exploration of the mid ocean ridge between South America and Africa. Core samples obtained from drilling revealed that rocks closer to the mid-ocean ridge are younger then rocks that are farther away from the ridges.
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Scientists created three-dimensional images of the earth’s interior by combining information from many different earthquakes.