Raghav JhunjhunwalaAIR 4 · CSE 2025 · 99 wordsTheir whole copy
Opening
volcanoes acts as vents upon the earth's surface. It involves release of magma, pyroclastic debris, etc.
Body · points and prose
Process Involved
I. magma formation → very high heat & pressure involved → Often around plate subduction
II. Intrusion via duct/Dykes into upper lithosphere
III. Extrusion as lava < Basaltic, Andesitic, Granitic
& formation of Extrusive landforms (cones, flood Province, caldera, etc.)
[Diagram showing volcanic conduit with Extrusion at surface, Intrusion into Lithosphere, and Magma formation at the base.]
Major volcanoes & Tectonic settings
[World map sketch showing: O-C convergence label with hatched lines near South America, O-O divergence label with cross lines in the Atlantic, C-C divergence label near East Africa, Mt. Cotopaxi near South America, Mt. Kilimanjaro near East Africa, and Volcanic Hotspots legend for Hawaii.]
Tectonic Settings
- Convergence
- O-C: Pacific & Cocos, Nazca, etc.
- Divergence
- O-O: Pacific & Eurasian
- C-C: African Rift valley
Close · a summary
Thus, the volcanoes depict one of the most fascinating phenomena.