What criteria are primarily used to classify mass wasting events?
15.2 Classification of Mass Wasting
- There are three criteria used to classify slope failures:
- The type of material that failed (e.g., bedrock or unconsolidated sediment),
- The mechanism of the failure (how the material moved as it failed), and.
- The rate of movement (how quickly the material moved).
What are the characteristics of mass wasting?
These features include intra-crater mass movements, flow-like and creep-like structures, slumping areas, landslides, and curved radial and concentric ridges. Intra-crater mass-wasting features are represented by lobate slides, talus material, dark patches on the crater wall, spurs along the crater rim and boulders.
What are the four main classifications of mass movement?
The four main kinds of mass movements are falls, topples, slides, spreads, and flows. Many of these include several different types.
What factors contribute to mass wasting?
Mass wasting is influenced by slope, material strength, water content, and amount of vegetation. Mass wasting can be triggered by storms, earthquakes, eruptions, and human activity. Fall, slide, flow, and creep are the main categories of mass wasting mechanisms.
Which of the following describes 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 are mass movements classified?
Mass movements can be classified on the basis of type of material moved and the characteristic type or form of movement. Failure: surface along which the slump occurred. Mass of regolith detaches from its substrate along a spoon-shaped sliding/ failure surface; slips coherently downhill.
How do you classify mass movements?
Mass movements can be classified on the basis of type of material moved and the characteristic type or form of movement. Failure: surface along which the slump occurred. Mass of regolith detaches from its substrate along a spoon-shaped sliding/ failure surface; slips coherently downhill.
How do Geologists classify mass movements?
If the material drops through the air, vertically or nearly vertically, it's known as a fall . If the material moves as a mass along a sloping surface (without internal motion within the mass), it's a slide . If the material has internal motion, like a fluid, it's a flow .
What two factors are used to characterize different mass movements?
Mass wasting occurs when a slope fails. A slope fails when it is too steep and unstable for existing materials and conditions. Slope stability is ultimately determined by two principal factors: the slope angle and the strength of the underlying material.
What are the 5 factors that affect 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 …
Which of the following is the most important factor in causing mass movement?
Gravity is the main force responsible for mass movements.
What are the main types of mass wasting?
The most common mass-wasting types are falls, rotational and translational slides, flows, and creep.
Which of the following movements are classified as mass wasting?
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.
How are mass movements classified quizlet?
Mass movements are classified according to how fast they move. Some mass movements move "rapid" and other move "slow."
What are the factors involved in 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 …
How is mass movement classified?
Mass movements can be classified on the basis of type of material moved and the characteristic type or form of movement. Failure: surface along which the slump occurred. Mass of regolith detaches from its substrate along a spoon-shaped sliding/ failure surface; slips coherently downhill.