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What are the different types of slope failure?
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What are the types of falls?
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What is a fall and what does it look like?
- can be a single rock or a large mass of rocks
- free fall occurs
- talus forms at the base of the cliff
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What is a slump and what does it look like?
- a type of slide where downward rotation occurs along a curved surface
- they are rotational
- upper surface remains relatively undistrubed
- causes accurate scars and depressions
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What cause slumps?
- human activities (oversteepening of an incline)
- erosion undercutting slopes (sea shore)
- heavy rain & earthquakes
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What are slides and what do they look like?
- when rocks/debris slide down a pre-existing surface
- translational
- talus common at base
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What is the difference between slumps and slides?
slumps occur along a curved surface, slides do not
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What are the different types of sediment flow?
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What is slurry?
- between 20 and 40% water
- considered saturated
- three types: solifluction, debris flow, mud flow
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What is an illegal word?
mudslide!!!
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What is a granular flow?
- has between 0 and 20% water
- not saturated
- air causes them to flow like liquid
- five types: creep, earthflows, grain flows, debris avalanches, snow avalanches
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How can you prevent landslides?
- grading: increases slope stability
- slope support: retaining walls
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What is a cut and fill operation?
- material from upper slope can be moved to the base
- type of grading
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How are benches formed?
- cut stair steps into the land
- type of grading
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What are retaining walls made from?
- concrete/brick
- stone-filled wire baskets (gabiens)
- series of piles of long concrete, steel, or wooden beams driven into the ground
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What are driving forces?
when the weight on top of slope material changes, slope materials are pushed down
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What are resisting forces?
- oppose downward movement
- stronger materials that prevent driving forces from moving the slope down
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What are the forces on slope?
- type of earth material
- slope and topography
- climate
- vegitation
- water
- time
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