Which risk increases when basaltic lava erupts underwater?

💡 Explanation

Hyaloclastite formation increases underwater because rapid cooling causes brittle fracturing and fragmentation of lava due to thermal stress; therefore, the answer is hyaloclastite formation rather than other lava features because those relate instead mostly to viscosity during subaerial eruptions.

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• Which mechanism causes effusive lava flows to transition into more explosive eruptions as silica content increases in a volcano?
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