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30 March, 19:32

Explain how ocean ridges and trenches are formed.

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  1. 30 March, 20:00
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    Ocean trenches and ridges. Trench: very deep, elongated cavity bordering a continent or an island arc; it forms when one tectonic plate slides beneath another. Ridge : underwater mountain range that criss-crosses the oceans and is formed by rising magma in a zone where two plates are moving apart.
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