The Impact of Volcanic Activity.

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A Volcanic event can have a range of impacts affecting the area immediatly around the volcano or the entire planet. Effects can be categorised into Primary and Secondary

Primary Effects:

Tephra- Solid material of varying grain size, from volcanic bombs to ash particles ejected into the atomosphere.

Pyrolcastic Flow - Very hot (800c), gas charged, highvelocity flows made up of a mixture of gases and tephra.

Lava Flows -

Volcanic Gases - including carbon dioxide, carbon monoxide, hydrogen sulphide, sulphur dioxide and chlorine. Emissions of carbon dioxide from Lake


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