Question

Which of the following constitutes landslides due to geologic factors?

• A. Weak strength of material below ground surface
• B. Excavation of slope for construction
• C. Cutting/filling done near stream
• D. All of the above

Hint:

Weak materials beneath the surface are the primary geologic cause of landslides, leading to slope instability.

Answer 1

The Correct Option is A

Landslides caused by geologic factors typically result from the weak strength of materials beneath the surface, such as loose soil, clay, or unstable rock formations. This reduces the stability of the slope, causing it to fail and result in a landslide.
While excavation of slopes and cutting/filling near streams can trigger landslides, these factors are typically considered human activities or environmental disturbances rather than geologic causes.
Geologic factors related to landslides are primarily driven by the characteristics of the earth's materials, such as weak or loose soil layers.