WHAT ARE THE VOLCANOES?

A volcano is a mountain or hill that has an opening through which gaseous, liquid or solid materials can escape from inside the earth. A volcano is a fissure of the earth's crust on which a cone of molten and solid matter accumulates that is thrown through the chimney from inside the Earth. On top of this cone there is a concave formation called crater. When activity occurs on a volcano it is said that the volcano is erupting.

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Structure

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1- The magmatic chamber

It is where the molten rock is stored, which can come from the Asthenosphere (100-700 kilometers, in the limits of plates, dorsal and subduction zones) or the Lithosphere (by decompression of solids they become liquids), which forms the wash.

3- The crater

is the part of the volcano where the materials are thrown outside.

4- The volcanic cone

is the agglomeration of lava and fragmented products. It is also possible that fractures of the volcanic cone or eruptions form adventitious craters that open on the flanks or at their base and whose secondary chimneys have communication with the main one.

2- The chimney

It is the conduit where the lava rises.

Hawaii Island Volcanoes

Types of volcanoes

Volcanoes are classified by the type of volcanic structure or building and by the type of activity or eruption they present. Both aspects are related to the tectonic environment that gave rise to them. On the other hand, this type of classifications is not exact and the same volcano can combine different structures, as well as present changes in the type of eruption type. Volcanoes are classified:

  • Composite volcanoes or stratovolcanoes
  • Boilers
  • Shield volcanoes
  • Lava Domes
  • Ash and scum cones