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← GeographyWhich environmental consequence results when volcanic tephra deposition follows heavy rainfall?
A)Lahars and mudflow formation✓
B)Accelerated glacial ice accumulation
C)Enhanced thermohaline circulation
D)Stratospheric aerosol cloud dissipation
💡 Explanation
Volcanic tephra mixed with heavy rainfall causes unstable slurry flows because water saturates the unconsolidated tephra, activating the mechanism of liquefaction. Therefore, lahars form rather than causing effects on glaciers, ocean circulation or atmospheric aerosols which rely on thermal mixing or atmospheric lift.
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