Exam 14: Mass Wasting: The Work of Gravity

Which statement best describes liquefaction?

Technically, a lahar is actually a type of ________.

Which one of the following materials has the maximum, sustainable, slope angle, as determined by the angle of repose?

Construction is most difficult in the discontinuous permafrost zone (> 54° N)because soil properties vary laterally and are hard to predict.

Debris flows are most often triggered by ________.

What term denotes the exposed portion of the slip surface beneath a slump block?

Earthflows and slumps generally involve movement of unconsolidated or weakly consolidated soil and regolith.

What three criteria are used to classify mass wasting processes?

What popular stretch of highway in Canada is notorious for rockslides and debris flows?

Over what time frame do earthflows remain active?

How much of Earth's land area is underlain by permafrost?

Lahars are basically debris flows associated with steep volcanic valleys and unconsolidated volcanic deposits.

What is another name for swift destructive volcanic mudflows, like those formed during the 1980 Mount St.Helens eruption?

Frost action will make a slope less stable.

How does water affect the internal cohesion of clay-bearing soils and regolith?

If creep moves very slowly, by what evidence or how can it be recognized?

What term denotes the exposed slip (fracture)surface beneath a slump block?

How did First Nations people refer to Turtle Mountain near Frank, Alberta before the 1903 slide?

What is the fan-shaped pile of broken rock fragments at the base of a steep, bedrock slope or cliff?

What two types of mass wasting move essentially by sliding down a planar or curviplanar slope along an underlying fixed surface?