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.

• Which mechanism accounts for the formation of island arcs at convergent plate boundaries?
• Which outcome occurs when offshore winds consistently encounter coastal dunes?
• Which shift occurs in coastal upwelling patterns along South America's western coast during an El Niño event?
• Which phenomenon results from the Coriolis effect deflecting Northern Hemisphere surface currents?
• Which outcome occurs when sustained unidirectional wind abrasion shapes desert pavement?
• Which consequence results when strong pressure gradients interact with the Coriolis effect in the upper troposphere?