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Geography

Which outcome commonly results when basaltic lava encounters seawater?

A)Formation of pillow lava structures
B)Creation of explosive pyroclastic surges
C)Development of extensive lava tubes
D)Solidification into smooth pahoehoe flows

💡 Explanation

Pillow lava forms during submarine eruptions; rapid cooling leads to a bulbous shape because the water quenches the lava's exterior, creating a solid crust, rather than allowing tube formation or smooth flows; thus, pillow structures occur underwater.

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