1.8 Chile

Question 1

What type of plate boundary does chile lie on

Answer 1

Convergent

Question 2

What’s so dangerous about chile?

Answer 2

Major EQ and volcanic eruptions
EQ can trigger avalanches, rock avalanches and landslides

Question 3

What are some stresses?

Answer 3

Angle of slope
Rainwater/saturation
Vibration
Earthquakes
Sea, cliff erosion

Question 4

What are some strengths?

Answer 4

Lubricant layers
Tree/vegetation roots
Consolidation of material
Porosity if soil

Question 5

What are factors that promote landslides

Answer 5

Rock type - weak saturated material or shattered rock is more likely to move than solid bedrock
Permeability - How permeable is the surface?
Prolonged rainfall - this will saturate the soil and encourage movement.
Buildings - increase weight in the slope and add to downward gravity

Question 6

Shield volcanoes?

Answer 6

Constructive plate boundary
Divergence
Lower silicates and gas content in magma
Continuous eruption, pressure release
Calmer eruption - gas and lava
Runny basaltic lava, gentle slope, shorter volcano

Question 7

What is the Benioff zone?

Answer 7

It is an area of seismicity / slab moving downwards
The speed and movement of the rock produces earthquakes