intro_to_geo_3

intro_to_geo_3 - Plate tectonics Continental Drift Alfred...

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Plate tectonics Continental Drift Alfred Wegener stated that the continents had once been contiguous, forming a supercontinent (which he termed Pangaea ), and that they later moved apart to form their present configuration Wegener’s ideas had few supporters during his lifetime because he could not provide a workable mechanism through which continents could move with respect to one another Wegener’s Evidence Fit of continental coastlines across the Atlantic Distributions of animals and plants within the fossil record Matchup of rock units found on continents that are now widely separated Interpretation of ancient climatic belts that are discordant with the modern positions of the continents During the twentieth century, paleomagnetic data showed that continents must have drifted, because the rocks of isolated continents produce unequal apparent polar-wander paths for the magnetic north pole Additionally, within the rocks of a single continent, magnetic inclination angles
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intro_to_geo_3 - Plate tectonics Continental Drift Alfred...

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