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".
Reasons of Volcanic Eruption
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
- Icelandic (Sheet)
- Strombolian (Constant)
- Vulcanian (cauliflower)
- Hawaii (Peaceful)
- 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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