Plate Margins
- Created by: Riya2105
- Created on: 22-10-19 11:44
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- Destructive plate margin
- Two plates are pushed together and the denser oceanic crust gets subducted beneath the lighter continental plate
- usually involves an oceanic plate and a continental plate
- Plate Margins
- Constructive plate margin
- Two plates move apart from each other. A gap appears and molten magma rises to fill the gap. This solidifies to create new rock on the sea bed.
- Mostly forms shield volcanoes and the movement causes earthquakes.
- Collision plate margin
- Two continental plates crash into each other
- As they collide, they trigger earthquakes.
- The rocks between the plates get pushed up and they fold to create fold mountains.
- Conservative plate margin
- the plates move past each other or are side by side moving at different speeds. As the plates move, friction occurs and plates become stuck. Pressure builds up because the plates are still trying to move. When the pressure is released, it sends out huge amounts of energy, causing an earthquake.
- No volcanoes are formed here
- Constructive plate margin
- When the plate sinks into the mantle it melts to form magma. The pressure of the magma builds up beneath the Earth's surface. The magma escapes through weaknesses in the rock and rises up through a composite volcano
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