9.2: Sea-Floor Spreading in the early 1900s, scientists using sonar (SOund Navigation And Ranging) discovered deep-ocean trenches deep-ocean trenches: - ppt download
Ocean Trench
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999 Ocean Trench Stock Photos, Pictures & Royalty-Free Images - iStock | To sua ocean trench
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Ocean Trenches
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Yap Trench: The Submarine Trench of The Pacific Ocean - Ocean Fauna
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Here's How Oceanic Trenches Are Formed – Nayturr
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Deep Ocean Trenches
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