The Formation of a Giant Continental Caldera Includes All but Which

question 15

Multiple Choice

The formation of a giant continental caldera includes all but which of the following?

• A)Rising magma forms a low-density cap rich in SiO₂ and gases,bulging the ground surface upward.
• B)Basaltic eruptions begin from circular fractures surrounding the bulge.
• C)Magma pours out in high-volume pyroclastic flows,causing the ground surface to sink into a caldera.
• D)Removal of magma decreases the pressure on the magma below the caldera,causing new magma to bulge up the caldera floor.
• E)All of these are correct.

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