What Is the Magma Source for Mid-Ocean Ridge Basalt

question 112

Multiple Choice

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

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

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