Which Explanation Best Describes How Oceanic Crust Is Formed

question 29

Multiple Choice

Which explanation best describes how oceanic crust is formed?

• A) Continental crust is swallowed by the sea at subduction zones.
• B) Oceanic crust is extracted from the mantle by partial melting and crystallization.
• C) Oceanic crust crystallizes in the core and is pushed up through volcanic pipes.
• D) Oceanic crust formed when magma ocean cooled and has remained unchanged except around plate boundaries and at hot spots.

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