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← GeographyWhich outcome occurs when prolonged volcanic fissure eruptions saturate sloping terrain?
A)Formation of extensive pahoehoe lava flows
B)Development of thick laterite soil horizons
C)Initiation of large debris avalanches✓
D)Widespread deposition of varved sediments
💡 Explanation
The saturation reduces the shear strength of the slope, leading to a debris avalanche because the mechanism is pore pressure increase by increased saturation on slopes causing instability. Therefore, avalanches result, rather than slow soil formation or lava solidification.
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