Asked by Melissa Thompson on Jul 13, 2024
Verified
Which of the following factors indicates a high risk for volcanic mudflows or lahars?
A) a shield volcano that forms a low mountain in the tropics
B) a volcano whose hillslopes are covered with hard basaltic lava
C) a volcano with a thick covering of snow or ice
D) all of these
Lahars
Volcanic mudflows or debris flows composed of a slurry of pyroclastic material, rocky debris, and water, that flow down from a volcano, often following a volcanic eruption.
Basaltic Lava
A type of molten rock that is low in silica and flows easily, typically forming smooth, broad volcanic features.
Shield Volcano
A type of volcano with broad, gently sloping sides, built by the eruption of low-viscosity lava that can flow long distances.
- Awareness of the risks associated with different types of eruptions and volcanic features.
Verified Answer
ZK
Zybrea KnightJul 15, 2024
Final Answer :
C
Explanation :
Volcanoes with a thick covering of snow or ice are at high risk for volcanic mudflows or lahars because the heat from an eruption can rapidly melt the snow or ice, mixing with ash and debris to form destructive mudflows.
Learning Objectives
- Awareness of the risks associated with different types of eruptions and volcanic features.