What are the main causes of mass movement?

Gravity is the main force responsible for mass movements. Gravity is a force that acts everywhere on the Earth’s surface, pulling everything in a direction toward the center of the Earth.

What are the 3 factors that cause mass movement?

Such factors include: weathering or erosional debris cover on slopes, which is usually liable to mass movement; the character and structure of rocks, such as resistant permeable beds prone to sliding because of underlying impermeable rocks; the removal of the vegetation cover, which increases the slope’s susceptibility …

What are the 4 factors of mass movement?

Triggers of Mass Movements The transfer of rock and soil downslope due to gravity is called mass movement. Among the factors that commonly trigger mass movements are saturation of surface materials with water, oversteepening of slopes, removal of vegetation, and earthquakes.

What are the main mass movements?

The most common mass-wasting types are falls, rotational and translational slides, flows, and creep. Falls are abrupt rock movements that detach from steep slopes or cliffs. Rocks separate along existing natural breaks such as fractures or bedding planes. Movement occurs as free-falling, bouncing, and rolling.

What is the main cause of mass wasting?

It can be triggered by natural events like earthquakes, volcanic eruptions and flooding, but gravity is its driving force. Although gravity is the driving force of mass wasting, it is impacted mainly by the slope material’s strength and cohesiveness as well as the amount of friction acting on the material.

What is mass movement What are the types of mass movement class 9?

Mass movement is the movement of rock and soil down slope under the influence of gravity. Rock falls, slumps, and debris flows are all examples of mass wasting.

What is mass movement and their causes in geography?

Mass movement is the downhill movement of sediment that moves because of gravity. There are four different types of mass movement: Rockfall. Bits of rock fall off the cliff face, usually due to freeze-thaw weathering. Mudflow.

What are the 5 type of mass movement?

For such cases the name of the initial type of movement should be followed by an “en dash” and then the next type of movement: e.g. rock fall-debris flow ( WP/ WLI, 1990). Types of landslides: (1) a fall; (2) a topple; (3) a slide; (4) a spread; (5) a flow.

What is mass movement in geography?

Mass movement is the downhill movement of sediment that moves because of gravity. There are four different types of mass movement. Rockfall. Bits of rock fall off the cliff face, usually due to freeze-thaw weathering.

What are the three main types of mass movement?

3 types – of mass movements are common, based on degree of disintegration of the material during movcement:

• Submarine slumps – Coherent blocks break and slip.
• Submarine debris flows – Moving material breaks apart.
• Turbidity currents –Sediment moves as a turbulent cloud, called a turbidity current.

Where does mass movement occur?

Mass movement, often called mass wasting, is the downslope movement of a mass of surface materials, such as soil, rock or mud. This mass movement typically occurs along hillsides and mountains due to the influence of gravity and can happen very slowly or very quickly.

What type of mass movement is fall?

The basic types of landslide movement are: Fall. This is generally characterized by rapid or extremely rapid rate of movement with the descent of material characterized by a freefall period. Falls are commonly triggered by earthquakes or erosion processes.

What name was given to the mass movement?

The Great Migration was given to the mass movement of African Americans from the South to northern cities.

What are the effects of mass movement?

Mass movements affect the following elements of the environment: (1) the topography of the earth’s surface, particularly the morphologies of mountain and valley systems, both on the continents and on the ocean floors; (2) the character/quality of rivers and streams and groundwater flow; (3) the forests that cover much …

What are the causes and effects of mass wasting?

The causes of mass wasting include an increased slope steepness, increased water, decreased vegetation and earthquakes. One of the types of mass wasting that is an example of the slope failing is a slump. This is the sliding of coherent rock material along a curved surface.

How can we prevent mass movement?

Mass movement control must be primarily preventive: e.g., mapping vulnerable zones, drawing up a land use plan, banning building work or any modification of slopes, and protection in the form of coppice forests.

What is flow in mass movement?

Flows are a mixture of water, rock and sediment. They move very quickly. Large flows can bury entire villages. Smaller flows can block roads.

How is a slump formed?

A slump is a form of mass wasting that occurs when a coherent mass of loosely consolidated materials or a rock layer moves a short distance down a slope. Movement is characterized by sliding along a concave-upward or planar surface.