What Causes slump mass movement?

What Causes slump mass movement?

Slumps involve movement along one or more curved failure surfaces, with downward motion near the top and outward motion toward the bottom (Figure 15.14). They are typically caused by an excess of water within these materials on a steep slope.

Is a slump An example of mass wasting?

Mass wasting 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. Often lubricated by rainfall or agitated by seismic activity, these events may occur very rapidly and move as a flow.

How does climate influence mass wasting?

Climate is based on temperature and precipitation. Mass wasting is prone in the spring-time when snow melt, water saturation, and runoff is greatest. Also the type of climate will help determine the type of mass wasting. Humid climates tend to have slides, where water-saturated slopes fail and fall.

What are the factors that may trigger mass wasting?

Mass-wasting events are triggered by changes that oversteepen slope angles and weaken slope stability, such as rapid snow melt, intense rainfall, earthquake shaking, volcanic eruption, storm waves, stream erosion, and human activities. Excessive precipitation is the most common trigger.

What process promotes mass wasting events?

Mass-wasting events often have a trigger: something changes that causes a landslide to occur at a specific time. It could be rapid snowmelt, intense rainfall, earthquake shaking, volcanic eruption, storm waves, rapid-stream erosion, or human activities, such as grading a new road.

How do you identify a slump?

Slump material moves as a whole unit, leaving behind a crescent shaped scar. Figure 2. Trees with curved trunks are often signs that the hillside is slowly creeping downhill. Creep is the imperceptibly slow, steady, downward movement of slope-forming soil or rock.

What are the 4 factors that influence mass wasting?

Mass wasting is the downhill movement of Earth materials under the pull of gravity. Mass wasting is influenced by slope, material strength, water content, and amount of vegetation.

What are the major factors that cause mass wasting?

What are the 4 types of mass wasting?

The most common mass-wasting types are falls, rotational and translational slides, flows, and creep.

What is the difference between a slump and mass wasting?

Another type of mass wasting is a rockslide, which is the sliding of rock material down a mountain. It is similar to a slump, in that there is a mass failure of the slope, but a rockslide does not rotate as a block around an axis, like a slump.

What is a slump in geology?

A slump is a type of mass wasting that results in the sliding of coherent rock material along a curved surface. A slump is sometimes referred to as a rotational slide because a portion or block of the slope ‘slides’ down as it ‘rotates’ around an axis parallel to the slope.

What are the causes of mass wasting in geography?

Vibrations from machinery, traffic, weight loading from accumulation of snow; stockpiling of rock or ore; from waste piles and from buildings and other structures. Another natural cause of mass wasting is excess water on a slope due to melting snow or heavy rains. This cause slope increases.

Why do slumps happen?

Slumps can also be blamed on human activities. For example, if a road crew cuts away the base of a mountain slope to make room for a road, the structural stability of the slope could be weakened, resulting in a slump. Another type of mass wasting is a rockslide, which is the sliding of rock material down a mountain.