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UPSC Geography 11 - Mega Relief of Second Order (Mountain, Plateau, canyons, Islands, Trenches, Ridges)

This Post and the attached video will explain the following points of Micro-Notes on UPSC Geography 11 - Mega Relief of Second Order (Mountain, Plateau, canyons, Islands, Trenches, Ridges). Copy & Note it down carefully, as it will be very useful in Fast Revision of the entire topic of "UPSC Geography 11 - Mega Relief of Second Order (Mountain, Plateau, canyons, Islands, Trenches, Ridges)".

UPSC Geography 11 - Mega Relief of Second Order (Mountain, Plateau, canyons, Islands, Trenches, Ridges)


Theories of Formation

 Plate Tectonic Theory

  • Plates Collision or Diversion
  • Oceanic Crust (thinner & Denser) always Subduct under Continental crust
  • Eurasian Plate- slowest
  • Cocoa plate - fastest
  • Scotia plate - Argentina
  • Nacaza - South America
  • Seafloor spreading- Mid oceanic divergent boundary- youngest


Continental Drift Theory
  • By Alfred wegener
  • Once one then breaks apart & flow away
  • Evidence from Rocks, Glaciation & Flora / Fauna (Glossopteris & cynognathus)
  • Pangea -Paleo-tethys ocean
  • Breaks into Lauretia & gondwanaland, Neo tethys ocean
  • Cimmerian super terrain-rifted from Gondwana in the Southern Hemisphere 

Mountains
  • Orogenic Activities- vertical movement
  • Everest > K2> Nanga Parbat
  • Atlas
  • Fold mountain
  • Block Mountain
  • Anticlines is inverted U fold
  • Ridge (|), range (|||), chain(|\|\|\), group (same period-unsystematic), system (different period)

Plateau
  • Intermontane- Between two mountains
  • Erosional -Soft rock often erodes away on the top of a plateau
  • Volcanic - volcanic eruptions that slowly build up over time, forming a plateau from the resulting lava flows
  • dissected plateau forms as a result of upward movement in the Earth's crust

Island
  • Australia (largest) 
  • Greenland
  • new guinea
  • Borneo

Oceanic Ridges (Mountains)
  • Dolphin & challenger - Atlantic
  • Aden Ridge
  • Explorer - vancouver
  • Gorda- California
  • Juan de falta - Washington state
  • Gakkel - slowest - Arctic
  • Carlsberg - Indian ocean

Oceanic Trench
  • Challenger Deep - Mariana Trench
  • Sandwich trench- Southern Ocean






** 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 11 - Mega Relief of Second Order (Mountain, Plateau, canyons, Islands, Trenches, Ridges).


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