The outer core is the dominant cause of the Earth's magnetic field.
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Q82: The entire geologic time scale is divided
Q83: The boundary between the crust and the
Q84: Extrusive igneous rocks are coarse grained,and intrusive
Q85: Each rock family can form from rocks
Q86: Metamorphic rocks that are foliated are layered
Q88: Metamorphism occurs when rocks become deeply buried
Q89: The subsidence and rebound of the asthenosphere
Q90: The Precambrian accounts for roughly 50% of
Q91: We know more about the Jurassic than
Q92: The three rock families are igneous,sedimentary,and metamorphic.
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