Quiz - Topic 9
Which statement best describes slumping, a mass movement process?
A block or blocks of unconsolidated regolith slide downhill along a curved slip surface.
As an erosional process, how is mass movement unique from wind, water, and ice?
Mass wasting does not require a transporting medium.
How do freezing, thawing, wetting, and drying contribute to soil creep?
The soil expands and contracts, lifting particles and dropping them a slight distance downslope.
Which statement best describes the way vegetation affects slope stability?
Vegetation protects against erosion from raindrops and helps bind together soil and regolith.
In which of the following areas would you expect landslides to be MOST common?
coastal California
Which mass movement process has the slowest rate of movement?
creep
Which one of the following materials has the maximum, sustainable, slope angle, as determined by the angle of repose?
dry sand
Talus slopes are associated with what type of motion?
fall
All of the following are factors affecting mass movement EXCEPT for ________.
geologic age
Most rapid and spectacular mass movement events occur ________.
in rugged, geologically young mountains
The downslope movement of rock, regolith, and soil is called ________.
mass movement
Consider a steep highway cut made by removing slightly weathered to fresh, fractured, granite bedrock. Which of the following situations is most stable against rockslides?
one set of widely spaced, sub-horizontal fractures
Which of the following mass movements is most likely to occur in a geologic setting where the rock strata are inclined?
rockslide
Which type of mass movement involves a downward sliding mass of rock or unconsolidated material moving along a curved surface?
slump
Lahars are associated with which of the following?
volcanoes
