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Terrestrial Motion and Magnetism
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accretion Africa Alfred Wegener andesites anomalies areas Asia asthenosphere astronomer Atlantic axis basalt Beloussov belts Benioff zone century coastlines concept continental drift continental margins continents and oceans cooling Cretaceous crustal density depth distribution earth history evidence faults fauna favored Figure folded fossil Geological Society geologists Geophysical geosynclines global globe Gondwana Gondwanaland granites Greenland hemisphere Hess idea India island arcs kilometers Lake land landmass latitude Laurasia layer lithosphere Longwell magnetic mantle matching meters Meyerhoff Mid-Atlantic Ridge million moon mountain ranges North America northern occur ocean basins ocean floors oceanic ridges origin Pacific paleomagnetic Paleozoic Pangaea permanence planet plate motion plate tectonics polar wandering pole Precambrian present problem proposed published radioactive result rift rocks rotation Schuchert Science scientists sea level sea-floor spreading sediments seismic sial sialic sima Simpson Society of America South southern Suess suggested surface Tertiary theory Toit trenches uniformitarian valley volcanic Wegener's hypothesis zones