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GE
intrusion, subduction, petroleum, fold, geologic time scale, glacier, ocean basins, mantle, rhyolite, rock cycle, transform plate boundaries, palaeontology, foliated, magma, atmosphere, intrusive, divergent plate boundaries, mid-oceanic ridge, earthquakes, igneous rocks, fossil fuels, mantle convection, basalt, porphyry, biosphere, coal, succession, plutonic, crust, island arc, spreadnig centers, mineral deposit