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← GeographyWhich outcome occurs when rapid snowmelt saturates volcanic ash deposits?
A)Creation of a destructive lahar✓
B)Escalated rates of glacial calving
C)Immediate carbon sequestration increase
D)Formation of stable alluvial fans
💡 Explanation
Lahars form when significant water mobilizes ash deposits; the increased pore pressure reduces shear strength, triggering mudflow through liquefaction. Therefore, a lahar develops, rather than glacial calving or alluvial deposits, because unstable ash slurry requires unique source material.
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