Himalayas

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I Spell SSt inservice course KVGN

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Himalayas

  1. 1. FORMATION OF HIMALAYAS K.SUGUNA.R PGT GEO
  2. 2. CONTINENTAL DRIFT THEORY     PROPOSED BY ALFRED WEGNER IN 1912 A SINGLE CONTINENT PANGAEA SORROUNDED BY A SINGLE OCEAN PANTHALASA 200 MILLION YEARS AGO PANGAEA BROKE INTO TWO MAJOR LANDMASSES-ANKARA LAND AND GONDWANA LAND INDIA WAS A PART OF THE GONDWANA LAND LOCATED IN THE SOUTHERN HEMISPHERE
  3. 3. MOVEMENT OF CONTINENTS   CONTINENTS STARTED MOVING IN DIFFERENT DIRECTIONS FORCE-TIDAL FORCE POLAR FLEEING FORCE
  4. 4. PLATE TECTONIC THEORY    PROPOSED BY MCKENZIE,PARKER AND MORGAN IN 1969 EARTH CRUST IS MADE UP OF TECTONIC PLATES AND COMPRISES OCEANS AND CONTINENTS. FORCE-CONVECTIONAL CURRENT INSIDE THE EARTH
  5. 5. TYPES OF PLATE BOUNDARIES CONVERGENCE  DIVERGENCE  TRANSFORM FAULT 
  6. 6. CONVERGENCE    In plate tectonics, a convergent boundary, also known as a destructive plate boundary An actively deforming region where two (or more) tectonic plates of lithosphere move toward one another and collide. As a result of pressure, friction, and plate material melting in the mantle, earthquakes and volcanoes are common near convergent boundaries.
  7. 7. When two plates move towards one another, they form either a subduction zone or a continental collision.  During collisions between two continental plates, large mountain ranges, such as the Himalayas are formed.  
  8. 8. DIVERGENCE In plate tectonics, a divergent boundary or divergent plate boundary is also known as a constructive boundary or an extensional boundary  It is a linear feature that exists between two tectonic plates that are moving away from each other. 
  9. 9.    Divergent boundaries within continents initially produce rifts which produce rift valleys. Most active divergent plate boundaries occur between oceanic plates and exist as mid-oceanic ridges. Divergent boundaries also form volcanic islands which occur when the plates move apart to produce gaps which molten lava rises to fill.
  10. 10. TRANSFORM FAULT    A transform fault or transform boundary, also known as conservative plate boundary since these faults neither create nor destroy lithosphere, is a type of fault whose relative motion is predominantly horizontal, most transform faults are hidden in the deep oceans where they form a series of short zigzags accommodating seafloor spreading
  11. 11. FOLDING  WHEN THE FORCE IS HORIZONTAL IT LEADS TO FOLDING
  12. 12. FAULTING  WHEN THE FORCE IS VERTICAL IT LEADS TO FAULTING
  13. 13. Rift Valley    A rift valley is when two normal faults occur parallel to each other and the land sinks between the faults. There are two major examples of this. One being the Great Rift Valley in North Africa and the other, the San Andreas Fault in California. The top right picture is San Andreas Fault and on the bottom right is a diagram of what a rift valley looks like.
  14. 14. FORMATION OF HIMALAYAS  HIMALAYAS HAVE BEEN FORMED DUE TO THE COLLISION OF TWO CONTINENTAL PLATES-INDO AUSTRALIAN PLATE AND EURASIAN PLATE
  15. 15. RISING OF HIMALAYAS
  16. 16. EVIDENCES    ARTEFACTS USED BY STONE AGE PEOPLE FOSSILS OF SEA ANIMALS IN HIGH HIMALAYAS SEDIMENTARY ROCK MATERIALS

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