n. the ground along the bottom of the ocean also written
The Mariana Trench is the deepest seafloor trench in the world.
The Mariana Trench is the deepest seafloor trench in the world.
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Which ocean's seafloor is spreading fastest?
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What is the seafloor like?
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Why is it important to rise slowly and make safety stops after being on the seafloor at a deep level?
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The scientist studied the phenomenon of seafloor spreading.
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How many times have humans visited the Marianas Trench, a seafloor canyon in the Western Pacific?
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