Report copyright - The plate tectonic concept 5 · The plate tectonic concept 5 1 8 0 2 4 6-2-4-6-8-10 2 6 15 8 7 7 9 5 6 7 8 9 4 8 1.8 2.2 1.6 2.5 3.4 1.2 1 5 7 9 3 5 8 1 1.4 1.4 4 7 7 6 5 5 9 8 8
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