What Properties of the Source Magma Lead to the Formation

question 44

Multiple Choice

What properties of the source magma lead to the formation of a shield volcano?

• A)low viscosity and mafic composition
• B)high viscosity and felsic composition
• C)any magma composition so long as it contains a large portion of dissolved volatiles
• D)an intermediate composition magma that encounters seawater in the magma chamber

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