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UPSC Geography 08 - Volcanoes

This Post and the attached video will explain the following points of Micro-Notes on UPSC Geography 08 - Volcanoes. Copy & Note it down carefully, as it will be very useful in Fast Revision of the entire topic of "UPSC Geography 08 - Volcanoes".

UPSC Geography 08 - Volcanoes


Reasons of Volcanic Eruption

  • Plates Subduction
  • Plates Separation
  • Upper mantle eruption
  • Pacific Ring of Fire


Terms
  • Magma- Inside (upper Mantle- Peridotite)
  • Lava- Outside
  • Active Volcano
  • Dormant
  • Extinct
  • Angle of Repose
  • Cinder Cone
  • Sills, Dykes

Volcano Types
  • Magmatic- Erupts in fissure due to decompression
  1. Icelandic (Sheet)
  2. Strombolian (Constant)
  3. Vulcanian (cauliflower)
  4. Hawaii (Peaceful)
  5. Plinian (mt Vesuvius Italy 79 AD)
  • Phreatomagmatic- due to compression - Interaction between water & magma-rapid cooling
  • Phreatic Eruptions: Steam Explosion-loud
  • Surtseyan eruption- Shallow Sea
  • Limnic - Lakes
  • Submarine eruption, Sub-glacial eruption
Eruption Materials
  • Bomb >2.5 inch
  • Lapilli <2.5 inch
  • Pyroclastic Rock
  • Pyroclastic Flow- Avalanche

Famous Volcanoes
  • Mt kea - Tallest
  • Ojas de Salado (Chile -Argentina)
  • Cotopaxi (Ecuador)
  • Popocatepetl (Mexico)
  • Barren Island - India- dormant







** Above Video is created by KapsOne Studies and Placement Center, Nagpur for Guidance of UPSC Civil Service (IAS /IPS / IFS / IRS / SSC / Railways / NDA), MPSC Rajyaseva, UPPSC, MPPSC, BPSC, RPSC, NCERT Aspirants on UPSC Geography 08 - Volcanoes.


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