When breached, which outcome occurs in volcanic tephra dam?

💡 Explanation

Tephra dams create unstable impoundments. Dam failure results in a jökulhlaup or lahar caused by massive water release; because the dam suddenly collapses and mobilizes large amounts of sediment by gravity and water; therefore, a catastrophic lahar develops rather than other gradual processes.

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• Which consequence develops when intense rainfall saturates unconsolidated tephra deposits?
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