Plate Tectonic Theory
Plate Tectonic Theory : Global tectonics based on an Earth model characterized by a small number (10 to 25) of large, broad, thick plates(blocks composed of areas of both continental and oceanic crust and mande)each of which "floats" on some viscous underlayer in the mantle and moves more or less independently of the others. The continents form a part of the plates and move with them, like logs frozen in the ice floes
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