Tectonic Plate boundaries


	Destructive Plate Boundary	Constructive Plate Boundary
	Continental crust meets oceanic crust, it is denser and so goes down (oceanic). The oceanic crust then melts the rock under great pressure. Plates rub together and earthquakes and volcano occur. Volcano erupts in surface when pressure is releases	Occurs when plates move apart due to convection currents currents in the mantle. Magma fills up chamber and then after the eruption new crust forms as lava cools.
	Conservative plate boundary	What Volcano formations happen where
	At a conservative plate boundary plates cannot move past each other. The plates become locked and friction causes pressure to build. Suddenly pressure is released. This then causes seismic waves. Only earthquakes	At Destructive plate boundaries composite volcano forms and it is a typical volcano with a side vent. Eruptions are quite irregular. Materials erupted: Ash, lava, silica, gas, volcanic bombs. Shape: Tall and very steep Lava characteristics: Thick with silica in because of how long it takes to erupt. Shield volcano: Happens at constructive plate boundaries. Quite low formations with gentle sloping. Characteristics are that it is thin lava and runny. The eruptions mainly lava rather than ash and they erupt regularly.

Continental crust meets oceanic crust, it is denser and so goes down (oceanic). The oceanic crust then melts the rock under great pressure. Plates rub together and earthquakes and volcano occur. Volcano erupts in surface when pressure is releases

Occurs when plates move apart due to convection currents currents in the mantle. Magma fills up chamber and then after the eruption new crust forms as lava cools.

At a conservative plate boundary plates cannot move past each other. The plates become locked and friction causes pressure to build. Suddenly pressure is released. This then causes seismic waves. Only earthquakes

At Destructive plate boundaries composite volcano forms and it is a typical volcano with a side vent. Eruptions are quite irregular.
Materials erupted: Ash, lava, silica, gas, volcanic bombs.
Shape: Tall and very steep
Lava characteristics: Thick with silica in because of how long it takes to erupt.
Shield volcano: Happens at constructive plate boundaries. Quite low formations with gentle sloping. Characteristics are that it is thin lava and runny. The eruptions mainly lava rather than ash and they erupt regularly.

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