Olcanoes particularily

Volcanic eruptions are awesome and destructive; however, this natural phenomenon is beneficial in the long term. One of the earliest known written records of a natural disaster concerned the eruption of Pompeii in A.D. 79, and was recorded by Pliny the Younger in his letters to the historian Tacitus (Jashemski, 1979). Volcanic eruptions, ranging in intensity and numbering between 17 and 27 per year during the past decade (Bullard, 1984), continue to remind us of their potential impacts on the environment.

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Volcanic Eruptions and Hazards: What is a volcano? A volcano is a vent or  'chimney' that connects molten  rock (magma) from within the  Earth’s crust to the Earth's  surface.  The volcano includes the surrounding cone of erupted material.

50p khanhthan 13-09-2010 152 50   Download