Question

Regarding debris avalanches, which statements are accurate?

1. A debris avalanche is characterized by the chaotic, turbulent movement of rocks, soil, and other debris.
2. Debris avalanches are always composed of dry materials and never mixed with water or ice.
3. These types of avalanches are often triggered by seismic activity like earthquakes or volcanic eruptions.

• A. i, iii
• B. iii മാത്രം
• C. i
• D. iii

Answer 1

Answer:

A. i, iii

Debris avalanches are distinct from typical snow avalanches due to their primary composition: a turbulent mix of geological materials like rocks, soil, and vegetation. Unlike snow avalanches that primarily involve snow and ice, debris avalanches often include water or ice, giving them a slurry-like consistency. Their triggers are also more closely associated with geological events, as seismic activity can destabilize large volumes of loose material on steep slopes, leading to these powerful, destructive flows.