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Beginning of Paper
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Continental Drift
Continental drift is the theory that the positions of the earth's continents have changed a lot through geologic time. The German meteorologist Alfred Wegener proposed the first comprehensive theory of continental drift in 1912, on the basis of the way the continents fit together on the opposing Atlantic coas ....
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Middle of Paper
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.... had noted that continental crust grows by additions and that a ridge in the middle of the ocean runs almost all the way around the world. It was also noted that continental plates tear apart, drift apart, and collide with each other.
Seafloor Spreading Geophysicists, mapping the ocean floor with an instrument that measures magnetic fields, showed that the rocks on one side of the midocean ridge produced an opposing image geomagnetic pattern of the rocks on the other side. When they dated these rocks, it showed that those nearest the ridge is obviously younger than those f ....
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SUBJECTS
