Mass Movement - Sub Ariel Process

Question 1

What is mass movement

Answer 1

The movement of consolidated material (solid rock) and unconsolidated material (clay and soil) due to gravity

Question 2

RAPID - Rockfall

Answer 2

Sudden collapse or breaking away of individual rock fragments at a cliff face
Commonly associated with steep or vertical cliffs
Often triggered by physical weathering

Question 3

2nd MOST RAPID- Landslides

Answer 3

Involves a block of rock moving very rapidly downhill along a bedding plane that is parallel to the ground surface
Frequently triggered by earthquakes or very heavy rainfall when the slip surface becomes lubricated and friction is reduced

Question 4

MIDDLE SPEED - runoff

Answer 4

Overland flow occurs down a slope of cliff face
Small particles are moved downslope to enter the littoral zone
Considered a flow that transfers water and sediment from one store to another

Question 5

MIDDLE SPEED - mudflows

Answer 5

A mudflow involves mud flowing down hill usually over unconsolidated and weak bedrock such as clay often after heavy rainfall

Question 6

2nd TO SLOWEST - slumping/landslip

Answer 6

Slide surface is curved rather than flat. Commonly occur in weak unconsolidated clays and sands which causes a build up of pore water pressure

Question 7

SLOWEST - soil creep

Answer 7

Extremely slow form of movement of individual soil particles down hill