Q. Consider the following statements about the type of landslides:
- Topples usually occur on very gentle slopes or flat terrain.
- Falls happen due to the forward rotation of a unit under the actions of gravity.
- Topples happen due to the abrupt movements of masses of geologic materials.
Which of the statements given above is/are correct?
Answer:
None of the above
Notes:
- Landslides is a sudden movement of rock, boulders, earth or debris down a slope is termed as a landslide. They are natural disasters occurring mainly in mountainous terrains where there are conducive conditions of soil, rock, geology and slope.
- Falls happen due to the abrupt movements of masses of geologic materials, such as rocks and boulders that become detached from steep slopes or cliffs.
- Topples happen due to the forward rotation of a unit or units about some pivotal point, below or low in the unit, under the actions of gravity and forces exerted by adjacent units or by fluids in cracks
- In slides type landslide, rocks, debris or soil slide through slope forming material.
- Spread landslide usually occur on very gentle slopes or flat terrain.