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Deep-Sea Trench

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About 1 pages (45 words)
Oceanic trench Summary

Any long, narrow, steep-sided depression in the ocean bottom in which maximum oceanic depths (24,000–36,000 ft, or 7,000–11,000 m) occur.

The deepest known depression of this kind is the Mariana Trench. Most trenches occur at subduction zones, where one tectonic plate is thrust under another.

This is the complete article, containing 45 words (approx. 1 page at 300 words per page).

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    Deep-Sea Trench from Encyclopedia Brittanica. ©2009 Encyclopedia Brittanica. All rights reserved.

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