All about Earth Sciences.
The process of breakage and separation of sediments and particles of the rocks from the rock surface is known as weathering, while the process of wearing away/ transportation of these sediments from the rock surface to the low lying areas is known as erosion. The process of weathering and erosion collectively are known as Denudation. …
Volcanism and Landform Formation Denudation upon the forms produced by vulcanicity results in the evolution of a volcanic landscape. In the views of F.J. Monkhouse, “The product of vulcanicity vary from hardest of lavas to the softest of ashes often in close juxtaposition.” It has been witnessed that volcanic activity creates unique and distinct landscapes. …
Volcanic Form The erupted volcano comes in different forms. These forms are given as under: (1). Ash Cone: These are also called Tuff Cones. When heated rapidly by lava, water flashes to steam and expands violently, fragmenting huge amounts of lava into plumes of very fine grains of ash. This ash falls around the volcanic vent, creating an ash …
Active Volcanoes: An active volcano may be defined as the one which is definitely known to have erupted periodically in historic times. Kilauea volcano on Hawaii is the world’s most active volcano, followed by Etna in Italy and Piton de la Fournaise on La Réunion island. Further ordering the value of the activity of volcanoes …
According to improved knowledge of ocean floor, topography, and geology the entire Pacific Ocean floor constitutes a very large tectonic plate with smaller Cocos and Juan de Fuca Plates. Most of the global volcanic activity is concentrated at convergent plate boundaries. The majority of the world’s active volcanoes lie along the Pacific Ring of Fire. …
A crater is the mouth/ opening of the volcano. The molten magma is ejected through the vent of the volcano. The uppermost part of the vent or in other words the top opening of the vent is known as the crater. The crater is generally wider than the vent. When the lava/ejected material is sprayed …
The empty chamber of a volcano formed after the completion of the eruption is known as the Caldera. As the eruption of the volcano comes to an end, the vent and crater remain as a hollow shaped cavity. According to H.J de Blij, “A volcano‘s lava and pyroclastics come from a subterranean magma chamber, a …
The molten rocks (magma) are ejected as a result of volcanism. When the magma is extruded through the vent of the volcano, it is scattered all around the crater (mouth of the volcano). The magma after extrusion is known as ”Lava”. Composition of Lava: Lava is made up of crystals, volcanic glass, and bubbles …
The molten rocks present in the interior of the earth’s mantle is known as magma. The interior temperature of the earth is very high, which melts the rocks present in the mantle. The molten rocks when extrude through the vent of the volcano are known as lava. In other words lava before ejection is known …
It is also known as a fissure vent, eruption vent, or simply volcanic vent. A vent is a vertical pipe-like hole through which the volcanic materials/ lava (magma, rocks, debris, volcanic ash, water, and other fluids, and minerals) are extruded.