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Mountain Building - Physical Geography
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This lesson pertains to the mountains and its various types which have been explained by Bhanwar.

Bhanwar Singh
Ex- National Defence Academy (115 Course) Cleared Civil Services Examination, 2012

Unacademy user
period of oscillation of 3 cm microwave is (B) 10^-10 sec. T= wavelength / speed = 0.03 / 3x10^8 = 10^-10 sec.
the oceanic and mountain part is not explained in detail and well
sir Tethys sea became the Himalayas
good course but, it would have been great if every point was explained exhaustively.
Thanks for the course.
thank you sir !!@@!!@
  1. CRASH COURSE-WORLD GEOGRAPHY Presented by - Bhanwar Singh Sirohi


  2. PHYSICAL GEOGRAPHY - MOUNTAIN BUILDING OR OROGENESIS


  3. ABOUT ME BA. (Hons) in Law from Awadh University I Defence Academy (115 Course) Cleared Civil Services Examination, 2012 Hobbies - Writing Poetry Course Fee Contribute Follow me on Unacademy at: https://unacademy.in/user/sirohib


  4. FORCES EFFECTING EARTH There are various forces which are responsible for creation, destruction, re-creation and maintenance of different types of relief features on earth crust ON THE BASIS OF ORIGINN ENDOGENETIC FORCES EXOGENETIC FORCES SUDDEN OR CATASTROPHIC SLOW OR DIASTROPHIC DENUDATIONAL OR DESTRUCTIVE


  5. MOUNTAINS These are significant relief structures of second order on Earth's surface Generally height of Mountains is more than 1000m Orogeny term means the creation of mountains It is the primary mechanism of mountain formation Mountain are formed by upward and downward displacement of the Earth's crust which may be due to folding, faulting or compressional and tensional forces of the Earth's crust


  6. OROGENIC BELTS Mobile belts arranged in linear or arcuate shape Subjected to severe deformation and resultant mountain building Generally found near the edges of the continents Usually Young Fold mountain belts are found along continental margins Many other mountain belts extend to the ocean and abruptly terminates at the continental margins


  7. THEORIES OF MOUNTAIN BUILDING THEORY Geosynclinal Theory Thermal Convection Current Theory Radioactive Theory Continental Drift Theory Plate Tectonic Theory PROPOUNDER Kober Holmes Joly Wegener Hary Hess, Mackenii, Parker and Morgan


  8. TYPES (ON BASIS OF OROGENY) FOLD MOUNTAINS Formed when a thickly bedded sedimentary layer is subjected to endogenetic horizontal compression forces for a long period of time The sediments bend into up and down folds which later on develops into anficlines and synclines respectively In such mountains folds are arranged in a wave like pattern These are highest and extensive mountains of the earth NTICLINES SYNCLINES These mountains are further classified into Young Fold Mountains and Old Fold Mountains based on the time period of their formation Example-Himalayas, Alps, Atlas, Andes, Ural, etc


  9. TYPES (ON BASIS OF OROGENY) BLOCK MOUNTAINS Originate due to endogenetic tensional c tensional BLOCK\ BLOCKV BlOCK ( VALLEY / oc VALLEY/BLOCK force which leads to creation of Rift Valley MOUNTAINMOUNTAIN Block mountain or Horst is the upstanding part of the ground between two faults on either side of the Rift Valley or a Graben FAULT LINES Example-Vosges in France, Black Forest in Germany, Sierra Nevada in North America, Satpura and Vindhyan ranges in India


  10. TYPES (ON BASIS OF OROGENY) VOLCANIC MOUNTAINS Formed due to continuous deposition of lava which leads to formation of conical peak Example-Mauna Kea in Hawaii, Fujiyama in Japan, Cotopaxi in Ecuador RELICT MOUNTAINS These are not original mountains When original mountains are eroded by agents of degradation, they become Relict or Residual mountains Example-Aravallis, Eastern Ghats, Vindhyan in India Example -Aravalli, Eastern Chats, Vindhyan in India