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Geography

Which erosion event results from high pore liquid pressure in sediments on steep volcanic slopes?

A)Debris flow initiation
B)Lava tube collapse
C)Caldera formation
D)Pyroclastic surge ignition

💡 Explanation

Debris flows on volcanoes begin with increased pore liquid pressure, triggering **liquefaction**, because this reduces effective stress, thereby causing slope failure and flow, rather than eruption or collapse, which require different trigger conditions.

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