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Key terms: crust rift oceanic ridge spreading arm plates red formed basins seafloor east rug active dna continental pacific becomes past hess rise afar opening oceanic crust caused theory earth dense today weight mantle africa failed wegener geology new sea completely atlantic subduction new oceanic continental drift seafloor spreading oceanic basins plate tectonics continental crust sea floor spreading Search external links cited by footnotes on Wikipedia page Seafloor spreading: |
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