What is the Meaning & Definition of vulcanism

The vulcanism is a concept associated with Vulcan, the God of fire and metalworking, according to Roman mythology. For Geology, it is the system which explains the formation of the globe from the action of the fire within.
Volcanoes are the ducts that establish a direct communication between the Earth's surface and deep levels of the Earth's crust. However, the volcanoes are openings located in mountains and who, from time to time, spewing lava, ash, gases, clouds of volcanic ash (which look like to smoke) under a process called eruption.

These eruptions occur at the moment the magma (the mixture of molten rock and gases, among other components) found under pressure begins to be propelled to the surface through the volcanic vent. Other formations of the volcanoes are the fumaroles and secondary cones.

On their types, volcanoes can be classified as inactive or extinct (having therefore no record of eruptive activity) and assets (those who are in eruptive activity or have been recently).

The supervolcanoes are volcanoes with eruptions they produce are the larger of the Earth. The volume of magma expelled has the ability to change the climate for years, and even the landscape surrounding the volcano in question of abruptly.

Types of volcanic eruptions also depend on temperature, composition, elements dissolved in the magma and viscosity, for example.