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Why Is Earth The Only Planet with Plate Tectonics?
When, and how, did plate tectonics start? First, as we all know, plate tectonics involves large slabs of mass moving around on the surface of then Earth, and the concept was first proposed by Alfred Wegener, who noted that if you moved South America across to West Africa, the land masses fitted remarkably well. At the time this was generally regarded as an accidental coincidence, and the rest of…
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Why Plate Tectonics?
How did plate tectonics start? Why has Earth got them and none of the rocky planets have, at least as far as we know? In my ebook “Planetary Formation and Biogenesis” my explanation as to one of the reasons for why plate tectonics are absent on Mars is that the Martian basaltic mantle appears to have about 17% iron oxide whle Earth has 7 – 11%. This means it cannot make eclogite whereas Earth’s…
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