Types of Plate Margin
- Created by: Lotto65
- Created on: 12-12-15 16:21
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- Types of Plate margin
- Destructive
- 1) Plates come together
- Due to convection currents in the mantle
- 1X oceanic crust 1X continental crust
- 2) Oceanic crust sinks beneath continental crust
- Subduction
- Because oceanic crust is denser and heavier than continental crust
- 3) Oceanic crust is forced into the mantle where great pressure is exerted and the oceanic crust is destroyed to form magma
- Composite volcanoes
- Oceanic trenches
- 1) Plates come together
- Constructive
- 1) Plates move away due to convection currents in the mantle
- 2) Cracks and fractures form between the plates where there is no solid crust
- 3) Magma forces its way into the cracks and onto the surface
- 1) Plates move away due to convection currents in the mantle
- Conservative
- 1) Plates slide past each other at similar direction, angles and speeds
- 2) Get stuck
- Earthquakes
- Build up of pressure causes the plates to suddenly release
- Nothing created or destroyed
- 1) Plates slide past each other at similar direction, angles and speeds
- Collision
- 2X Continental plates
- Same density so one does not sink below the other
- Type of destructive plate margin
- Fold mountains
- 2X Continental plates
- Destructive
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