Fluvial Depositional landforms
Fluvial Erosional Landforms
Lake – Classification of Lakes
The article deals with various classification of lakes based on its origin, nature of inflow-outflow and trophic level. The article is useful for various competitive examinations
Rocks and types of rock
There are three major types of rocks, study about their origin, transformation and details of the cycle of rocks transformation
Tsunami and Its Causes
A Tsunami also called seismic sea waves, is one of the most powerful and destructive natural forces. Learn about its origin, effects and areas prone to Tusanami waves
A volcano is a rupture in the crust of the Earth from where gases, ashes and molten rock material – magma – escape to the ground. A volcano is called an active volcano if the materials mentioned are being released or have been released out in the recent past.
Pseudo Volcanic Features
Those topographic features that resemble the volcanic landforms but are non volcanic in origin are known as pseudo volcanic features. The pseudo volcanic features include meteorite crater, mud volcanoes, and salt plugs (salt dome).
Volcanism Types Based on Outflow of Lava
On the basis of out flow of lava volcanism can be classified into four types- Exhalative, Effusive, Explosive and subaqueous Volcanism. Exhalative volcanism is characterized by the discharge of materials in the gaseous form. It includes gases like steam, Sulphur Dioxide, carbon dioxide, carbon monoxide, hydrogen etc.
Volcanic Landforms – Extrusive and Intrusive
The landforms formed by the action of volcanoes and volcanic eruptions are known as volcanic landforms. The extrusive igneous rocks are formed when the cooling of Lava occurs above the Earth's surface. The intrusive igneous rocks or plutonic rocks are formed when the Magma cools within the earth's crust.
Volcanism: The mystery behind Volcanic eruptions
Volcanism refers to an igneous activity which includes the formation of magma, its upward movement, ejection of magma (lava) on the earth’s surface, and its cooling and solidification. Ejection of Lava to the surface during volcanic eruptions happens by the Fissure eruption and Central eruption.
Divergent plate boundaries
Divergent plate boundaries occur at locations where the lithospheric plates move away from each other. They occur above the rising convection currents in the asthenosphere. At the point of the crest of upliftment the plate is stretched, which breaks it and pulls the above plates apart, creating a divergent boundary.