Craters: It is a pit at the top of a volcanic vent. Calderas: It is a large depression more or less circular in plan with diameter several times that of a crater. Tephra: All fragmented ejects from the volcanoes. Ash: … Continue reading →

Cinder Cones Cinder cones are circular or oval cones made up of small fragments of lava from a single vent that have been blown up.  Cinder cones result from eruptions of mostly small pieces of scoria and pyroclastics that build … Continue reading →

Active Volcanoes An active volcano is a volcano which is either erupting or is likely to erupt in the future. Most of the active volcanoes are found in the Pacific Ring of Fire. For example – Barren Island in Andaman … Continue reading →

Hot Springs Ground water, coming in contact with the magma, gets heated beyond 36° C. It comes to the surface as a hot spring.  For example – Ladakh, Manali, volcanic regions of Iceland, YellowStone National Park. Geysers It is a … Continue reading →

Hawaiian Eruption Named after the Hawaiian volcanoes. They are the calmest types characterised by the effusive eruption of very fluid basalt-type lavas. Eruptions are not centralised at the main summit as with other volcanic types and often occur at vents … Continue reading →

What is it? A volcano is a vent or a fissure in the Earth’s crust through which lava, ash, rocks, and gases erupt. Volcanic magma is sourced from the asthenosphere. The appearance of volcanoes is mostly cone-shaped mountains or hills. … Continue reading →