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Subduction

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Author Topic: Subduction  (Read 555 times)
Arcturus
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« on: August 01, 2008, 12:46:22 am »

Theory on origin

There have been some recent theories on the beginnings of subduction and Plate tectonics generally. A recent paper by V.L. Hansen in Geology presented a hypothesis that mantle upwelling and similar thermal processes combined with an impact from an extraterrestrial source would give the early earth the discontinuities in the crust for the subduction of the denser material underneath lighter material.
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