What Is the Magma Source for Mid- Ocean Ridge Basalt

question 48

Multiple Choice

What is the magma source for mid- ocean ridge basalt?

• A) by spontaneous melting in mafic magma chambers within oceanic crust
• B) along block faults by frictional heating deep in the oceanic lithosphere
• C) It all comes from Hawaii then flows out laterally along the ridge system.
• D) decompression melting in the shallowest part of the asthenosphere beneath the ridge

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