Which feedback occurs when basaltic lava viscosity decreases?

💡 Explanation

Increased lava temperature decreases viscosity; therefore increased molten-rock mobility enhances further flow channelization due to focused thermal erosion, rather than increased block formation, because less viscous lava spreads thin.

• Which volcanic phenomenon develops when viscous lava accumulates rapidly over a vent on steep terrain?
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• Which risk increases when an earthquake causes liquefaction in an alluvial fan delta region supporting infrastructure?
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• Which outcome occurs when a building's foundation warms discontinuous permafrost?