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| area between the continental margin and mid-ocean ridge |
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| a science that draws on the methods and knowledge of geology, chemistry, physics and biology to study all parts of the world |
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| the measurement of ocean depths and the charting of the shape of the ocean floor |
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| a machine that uses sound waves to calculate the distance to an object |
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| small underwater craft used for deep-sea research |
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| changeover between a continent and the neighboring ocean basin floor |
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| a gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent |
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| a steep incline of the ocean floor leading down from the edge of the continental shelf |
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| deep, steep-sided valley that are cut into the continental slope |
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| occasional movements of dense, sediment-rich wate down the continental slope |
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| where the continental slope becomes less steep in slope |
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| a deep, steep sided canyon in the ocean floor |
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| a deep, smooth, nearly flat area of the deep ocean floor |
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| submerged volcanic peaks that are on the ocean floor and have not reached the ocean surface |
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| continuous range of mountians that winds around Earth, passes through all of Earth's oceans |
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