Spreading centers have relatively peaceful eruptions of magma because the ________.

A. Olivine-poor magma has a high-volatile content.
B. SiO2-poor magma is at high temperatures.
C. SiO2-rich magma is at a temperature just above the melting point of quartz.
D. Olivine-rich magma has a high viscosity.


Answer: B

Environmental & Atmospheric Sciences

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