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← GeographyWhich risk escalates inside deep canyons cutting through pyroclastic deposits?
A)Increased lahar hazard after heavy rain✓
B)Higher geothermal gradient fluctuations locally
C)Elevated CO₂ emissions due increased weathering
D)Reduced landslide threat due to consolidation
💡 Explanation
Lahar formation increases after heavy rains because the Infiltration Excess Overland Flow mechanism rapidly saturates unstable pyroclastic material along steep canyon walls; therefore, lahars form easily down-canyon, rather than water slowly filtering stabilising the slopes.
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