Which consequence results when a pyroclastic surge encounters standing water?

💡 Explanation

A lahar flow forms because rapid mixing of pyroclastic material and water initiates **sediment bulking**, increasing mass flow via buoyancy. Therefore this creates a lahar, rather than other volcanic phenomena requiring dry conditions such as Pele's hair.

• Which risk increases with increased thermokarst lake expansion?
• Which surface outcome of ventifact formation indicates wind direction?
• Which outcome occurs when the Earth's rotation weakens gyre circulation?
• Which mechanism causes tropical rainfall near the equator?
• Which consequence results when excessive sediment accretion obstructs tidal flow?
• Which outcome indicates accelerated sinkhole formation above aquifers?