IAS (Admin.) Mains Geography Geomorphology-Vulcanicity Study Material (Page 6 of 6)

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Volcanic Features: Extrusive & Intrusive

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Volcanoes have shaped the earth՚s crust since its existence, producing dramatic volcanic cones, volcanic domes, volcanic plateaus, fertile farmlands, islands, Craters and collapsing Calderas on the surface of the Earth. The volcanic activity also creates unique intrusive landforms in the form of Batholiths, Dyke, sills, Laccolith, Lapolith and Phacolith. The basic extrusive and Intrusive volcanic features are as follows:

Extrusive Feature

Craters and Calderas: The crater is a bowl or funnel-shaped depression or cavity usually of volcanic origin. It is usually more or less circular in the plan…

… (458 more words, 45 figures) …

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