A volcano is a mountain which is formed by the eruption of material from the earth’s interior through a central opening or groups of openings. Volcanoes are scattered over the world. Volcanoes can be divided into three categories based on volcano forms and type of volcanic activities. They are Shield, Composite and Explosion volcanoes
Description
A shield volcano is formed chiefly of layers of basalt (a dark, heavy lava). A few shield volcanoes are composed of andesite ( a related, less dense type of lava).
Description
A composite volcano has more frequent and violent explosive eruptions than shield volcanoes do. Lava may be extruded from either central crater or fissures on a volcano’s sides.
Description
Explosion volcanoes are composed of inclined layers of pyroclastic debris and contain no lava. During the eruption, debris is ejected from the crater. Most explosion volcanoes are formed during one period of eruption
0 comments: