free webpage counters Volcano Archives - Geography Center Your SEO optimized title page contents

Category: Volcano

Introduction to volcano

A volcano is an opening in the surface of the Earth from which magma (molten subsurface rock) and associated gases and ash erupt; also, the form or structure, usually conical, that is produced by the ejected material. Common to all volcanoes is a magma chamber. The magma chamber is a huge, subterranean caldron of molten

Distribution of Volcanoes

Distribution of Volcanoes: Volcanoes are generally found where tectonic plates are pulled apart or come together. A mid-oceanic ridge, for example the Mid-Atlantic Ridge, has example of Volcanoes caused by ”divergent tectonic plates” pulling apart; the Pacific Ring of Fire has example of Volcanoes caused by ”convergent tectonic plates” coming together. By contrast, volcanoes are

Types of Volcanoes

Volcanoes are classified by the type of eruption they experience. Broadly speaking eruptions can be either effusive or explosive. Effusive eruptions are sometimes called ”quiet eruptions”. Effusive eruptions are noted for their vast outpourings of every fluid type lava that easily runs across the surface. Explosive eruptions occur as violent explosions of lava and rock

Intrusive Landform of Volcanoes

Intrusive landform of Volcanoes: Only a small amount of magma actually reaches the surface, most is intruded into the crust where it solidifies and produces intrusive features. Intrusions (also known as plutons) tend to form where either the magma is rising slowly or if the crust is particularly thick with few weaknesses through which the

Extrusive Landforms of Volcanoes:

Extrusive Landforms of Volcanoes: Extrusive landforms are created by igneous activity at the surface of earth. There is wide range of volcanic landforms such: 01. Basic Lava Cone/Shield Volcanoes: Shield volcanoes are usually found at constructive boundaries: Constructive boundaries exist between two crustal plates that are moving away from each other, causing new crustal rocks to

Volcanic Activity

Volcanic Activity: A popular way of classifying magmatic volcanoes is by their frequency of eruption, with those that erupts regularly called active, those that have erupted in historical times, but are now quiet, are called dormant, and those that have not erupted in historical times are called extinct. There is no real consensus among volcanologists