1.9 Chile

Question 1

Shield volcano plate boundary

Answer 1

Constructive (divergence)

Question 2

Magma in shield volcanoes

Answer 2

Lower silicate’s and gas content in magma

Question 3

Eruption in shield volcano

Answer 3

Continuous eruption – pressure release
This means eruptions are calmer
Gentle slope, shorter volcano (runny lava)

Question 4

Composite volcano plate boundary

Answer 4

Destructive (Subduction)

Question 5

Magm composite volcano

Answer 5

Higher silicate gas content

Question 6

Eruption composite volcano

Answer 6

Longer dormancy - pressure build up
Explosive
Viscous andesitic lava (steep + tall)

Question 7

Benioff zone

Answer 7

Area of slab moving downwards - movement of rock causes earthquakes

Question 8

Chile plate boundary

Answer 8

Convergent (Antarctic plate below South America plate)

Question 9

Examples of 3 stresses

Answer 9

Change focal depth (higher MME)
Excavation under slope makes it more instable
Higher mountain uplift - more precipitation

Question 10

Example of 3 strength

Answer 10

Decrease urban infrastructure to make surface more permeable
Increase amount of vegetation (less deforestation)
Make slope less steep (runny lava) to allow less avalanches and freeze thaw rock breakdown