At the Same Temperature, Why Are Magmas with High Silica

question 153

Multiple Choice

At the same temperature, why are magmas with high silica contents more viscous?

• A)Because high viscosity magma will flow more readily and rhyolites flow the farthest.
• B)They are more linked together in chains and nets that are strong enough to resist flow.
• C)Any magma with more than 50% silica content is too sticky to flow.
• D)The magmas with high silica content are also richer in iron and too dense to flow.

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