Movement of Plates
- Convection currents move towards each other
- Oceanic plate is forced downwards into the mantle, becuase it is more dense, forming a 'subduction zone'
- Deep trench is formed where the plate it forced downwards
- Continental plate forced up into mountain range
- Oceanic crust begins to melt as it goes into the mantle - hotter nearer the core
- It then floats back up because it becomes less dense
- When material floats back up magma erupts back to the surface creating volcanes
Activity
- Both earthquake and volcanic activity
- Volcanic activity due to magma - huge/powerful - due to fiction and pressure
Example
Nazca Plate (oceanic ) and the South American Plate (continental)
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