CH 12

Based on the examples and discussion in Chapter 12, what is the relationship of climate to mass movement? Also, are certain climates more susceptible to mass movement? Why?

Mass wasting does not require water, wind, or glaciers to move material. However, the controls and triggers, such as excess water and no vegetation, may be influenced by the climate. Regions with heavy rains and melting snow can trigger mass movement. An area with little or no vegetation (e.g., deserts) may be prone to mass movement.

Which of the following statements concerning mudflows is NOT true?

Mudflows deposit talus slopes

Which type of movement involves a zone of weakness separating the moving material from the more stable underlying material?

Slide

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.

During wet weather or times when snow is melting, sometimes the downhill toe of a slump ________.

becomes an earthflow

In which of the following areas would you expect landslides to be MOST common?

coastal California

What process of mass movement is illustrated in the diagram below?

creep

Which mass movement process has the slowest rate of movement?

creep

All of the following are factors affecting mass movement EXCEPT for ________.

geologic age

A geologist wants to locate a horizontal coal bed on a soil-covered slope where soil creep is active. A distinctive sandstone bed underlies the coal bed. On the basis of weathered sandstone fragments in the soil, where is the coal bed?

just above the highest piece of sandstone seen in the soil

The downslope movement of rock, regolith, and soil is called ________.

mass movement

The most rapid type of mass movement is a ________.

rock avalanche

study this geologist's sketch. What are the are the three dots toward the right side of the image pointing to?

scarps

Why was the Alaskan pipeline built above ground and insulated?

to protect the pipeline against damage due to thawing ground and to keep the crude oil hot and fluid

Lahars are associated with which of the following?

volcanoes