Volcanos: types, formation, elements, activity in different parts of the worl

        This writing will define and discuss the electrical outlethole to embarrass: types of volcanoes,

formation of a volcano, and elements of a volcano; such as, lava, jolt fragments, and gas.

This paper also tells a little bit about volcanic activity in different parts of the world.

What is a volcano?

        

        A volcano is a vent in the ground from which molten rock and gas erupt. The molten

rock that erupts from the volcano forms a mound or mountain around the vent. The lava may

flow out as a viscous liquid or it may explode from the vent as solid or liquid particles.

Kinds of Volcanic Materials

         trey basic materials that may erupt from a volcano ar; 1. lava, 2. rock

fragments, and 3. gas.         

Lava

        

        Lava is the name for magma that has been released onto the Earths surface. When

lava comes to the Earths surface, it is red hot and may have temperatures of much than

2012 degrees Fahrenheit. Fluid lava flows swiftly down a volcanos slopes.

Sticky lava flows more slowly. As the lava cools, it may harden into many different

formations. Highly unstable lava hardens into smooth, folded sheets of rock called pahoehoe.

Stickier lava cools into rough, jagged sheets of rock called aa.



Pahoehoe and aa cover

large areas of Hawaii, where the terms originated. The stickiest lava forms flows of

boulders and rubble called block flows. It may also form mounds of lava called domes.

        Other lava formations are spatter cones and lava tubes. sputtering cones are steep hills

that can get up to one hundred feet high. They build up from the spatter of geyser-like eruptions of

thick lava. Lava tubes are tunnels formed from fluid lava. As the lava flows, its exterior

covering cools and hardens. But the lava below continues to...

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