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GE
biotte schist, hydrogeology, porphyry, marble, oceanic crust, folding, geologic time scale, island arc, reservoir, continental crust, epoch, glacier, fossil fuels, strata, rock cycle, atmosphere, plate boundaries, diorite, period, continental rifting, metamorphic rocks, mineral resources, basalt, magma, andesite, extrusive rocks, fertilizers, biosphere, intrusion, ocean basins, sedimentary rocks, economic geology