Which term describes eruptions that can melt snow and ice on the summit which mixes with the ash or mud?

• A. Ash Fall
• B. Mudflows
• C. Pyroclastic Flow
• D. Shield Volcano

Answer: (B)

When a volcanic eruption hits a snow- or ice-covered summit, heat can melt that ice. If melted water mixes with volcanic ash and other debris, it forms a dense, fast-moving mudflow that travels down the slopes. That flow is what mudflows describe. Ash fall is just ash settling through the air, pyroclastic flow is a hot, high-velocity mix of gas and ash that flows along the ground but doesn’t rely on melted snow to form, and a shield volcano is a type of volcano, not a process. So the described phenomenon—melting snow mixing with ash and debris to create a muddy descent—fits mudflows best.