magma Archive

Layer of Earth ASTHENOSPHERE !!

ASTHENOSPHERE The asthenosphere is one of the layers of earth lying below the lithosphere, approximately 80 to 200km beneath the earth’s surface and is a part of the upper mantle. It is made up of a layer of solid rocks. It has so much of pressure and heat that these solid rocks just flow down like liquids. These asthenosphere rocks are less dense than the lithosphere. This factor accounts for the movement of tectonic plates in the lithosphere to move on the earth’s surface. The temperature defines the thickness of the asthenosphere layer. As the temperature increases, the pressure exerted

What causes the super Volcano to erupt?

The volcanic eruptions are oozing out of magma from the earth core. What is magma? What causes it to explode? What are the factors responsible for volcanic eruptions?  Magma is formed by the melting of earth’s upper mantle and lower mantle. During the volcanic eruptions the magma contains some dissolved gasses. Volcano is nothing but the opening or crack through which this magma flows out. This volcano eruption occurs due to three main reasons: pressure from the gasses dissolved in magma, the buoyance of the magma and entry or collection of more and more magma in the existing region. How