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Geography

Which vent-related outcome increases greatly because expanding lava pressure exceeds rock strength?

A)Formation of a lava dome
B)Increased magma chamber crystallization
C)Stable, laminar lava flow
D)Reduced volatile gas emissions

💡 Explanation

A lava dome forms because magma's vesicularity (bubbles) increases the internal pressure, exceeding the vent's rock strength resulting in extrusive Vulcanian eruptions building the dome, rather than effusive flow or magma processes.

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