Constructive Margins:
- Plates move apart
- Magma cools and goes solid, crack in the Earth makes magma.
- Called magma in earth and lava on earth.
- Above process forms Iceland
Destructive
Margins:
- A trench is made
- Oceanic plate subducts under the continental plate because it is less dense
- Heavy plates under the lighter plate
- Fiction near the Benioff zone means it melts
- Magma rises and forms a composite cone volcano
- Molton pushes upwards causing magma to turn solid with it reaches the surface
- Land hitting lands which leads to fold mountains
- No subduction zone, they fold over instead
- On the boundaries of plate tectonics.