Which consequence results when pyroclastic surge erodes volcanic slopes?

💡 Explanation

Pyroclastic surges saturate slopes with ash; the mechanism is debris flow initiation. Subsequent rainfall causes mobilization because the saturated ash loses shear strength, therefore forming lahars, rather than altering lava viscosity or albedo changes.

• Which morphological outcome primarily occurs due to coastal armoring?
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• Which consequence results when volcanic ash suspends high in atmosphere?
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• Which outcome is most likely when urban infrastructure crosses a major transform fault zone?