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zubka84 [21]
3 years ago
10

6.

Geography
1 answer:
mr Goodwill [35]3 years ago
3 0

It's a process called subduction; oceanic crust tends to get colder and denser with age as it spreads off the mid-ocean ridges. It gets so dense, that it sinks in the upper mantle (subduction). This is like a giant recycling system for the oceanic lithosphere.

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Thanks for your question!Feel free to ask more

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