Mass movement Flashcards
1
Q
What is mass movement?
A
Downward movement of soil and rock
2
Q
Name the forms of mass movement:
A
- landslides
- rock falls
- mud flows
- land slip or rotational slip
- soil creep
3
Q
What is a landslide?
A
Large pieces of rock and debris fall off the cliff
4
Q
Why do landslides occur?
A
- All types of weathering
- surface runoff
- wave quarrying
5
Q
What are rock falls?
A
Pieces of rock theta fall off the cliff
6
Q
What causes rock falls?
A
All types of weathering
7
Q
What is a mud flow?
A
Where mud falls of the cliff
8
Q
What do rock falls occur?
A
Overland flow from rainfall lubricating the soil
9
Q
What are rotational slips?
A
A large clump of rock slumping down with the cliff in steps
10
Q
Why do rotational slips occur?
A
- Rain lubricates soil
- wave quarrying
11
Q
What is a soil creep?
A
Soil creeping down a ccliff
12
Q
Why do soil creeps occur?
A
overland flow lubrication soil
13
Q
What is solifluction?
A
Ground freezing in winter then thawing inn summer
