Volcanoes Errupting Mount St.Helens Never Seen Before Footage
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Uploaded by 09dartnellalexander on Jun 2, 2010
Volcanoes Errupting Mount St.Helens Never Seen Before Footage
Volcanoes are located along or near the tectonic plate boundaries.
These plates float on top of the earths mantle which is made up from semi-molten rock and moves very slowly.
The movement is caused by convection currents in the mantle.
Where the plates meet are called plate boundaries.
When two plates push against each other a destructive plate boundary is formed, here one plate is pushed down whilst the other squashed up. The plate buckles to form fold mountains and heat and pressure form a volcano. The molten rock is pushed up.
The constructive plate boundaries move apart very slowly therefore magma from the mantle is allowed to rise from the gap and cools therefore a volcano is born. Volcanoes can be both on land and underwater, a good example is the ring of fire which identifies both. Some underwater volcanoes become so large that it erupts out of the sea to form a volcanic island. Oahu in Hawaii is one such Island. This is a shield volcano as it is made from lava only flows quickly spreading over a large area forming wide, flatter features. Dome volcanoes again is made from lava only flows slowly and hardens quickly to form steep sided features i.e. Mt St. Helens.
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GREEEEEEEEEEEEAT vidio 09dartnellalexander!! I love the musik!!
1 year ago 4
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Why is there a face in the right side picture of the blue stuff at 1:49?
Halo4urmum 1 year ago 3
@Halo4urmum Its just an effect i added
09dartnellalexander 1 year ago 5