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Geography: Mass Wasting Events

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Questions and Answers

What is the angle of repose in the context of mass wasting?

The maximum height a mountain can reach without collapsing.

The angle at which water will flow downhill.

The steepest angle a hillside can maintain before sediments begin to move. (correct)

The temperature at which materials begin to melt.

Which of the following is the fastest type of mass-wasting event?

Creep

Fall (correct)

Flow

Slide

What are talus slopes typically composed of?

Vegetation and organic matter.

Water and soil layers.

Clay and silt deposits.

Sediments accumulated at the base of a hill or mountain. (correct)

What is a lahar?

A mudflow of volcanic origin. Signup and view all the answers

Which mass-wasting event is characterized as occurring at a slow rate?

Creep Signup and view all the answers

What causes a mass-wasting event to occur when a slope becomes steeper than the angle of repose?

Gravity acting on the aggraded sediments. Signup and view all the answers

What is the term used for steep cliffs left behind after a mass-wasting event?

Escarpments Signup and view all the answers

Which of the following can NOT trigger a mass-wasting event?

Dense vegetation growth Signup and view all the answers

Study Notes

Mass Wasting

Mass wasting is the action of gravity as a geomorphic agent
Common terms for mass wasting events are landslides, but this is not a technical term
Mass wasting can be triggered by various events like heavy rain, snowmelt, earthquakes, and forest fires, but not always a large event
Maximum steepness of the hillside/mountain is called angle of repose. When hillside/mountainside steepness exceeds angle of repose, gravity moves regolith downward until angle of repose is restored
Different types of mass wasting events exist, including falls, slides, flows, and creeps
A fall is the fastest type, followed by slides and flows
Creep is the slowest type, can be glacier-related (solifluction)
Mass wasting events can involve various materials like rock, debris, earth, or mud
Avalanche can be rock, mud, or a glacier-related snow avalanche
Accumulation of sediment from mass wasting events can create talus slopes or escarpments - steep cliffs at the base of a slope

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Description

Explore the fascinating phenomenon of mass wasting in this quiz. Learn about the different types, triggers, and effects of these gravity-driven events on landscapes. Test your knowledge on concepts like the angle of repose and the various materials involved in mass wasting processes.