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earth movements Endogenic forces

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 earth movements Endogenic forces earth movements Endogenic forces Presentation Transcript

  • Earth movements(endogenetic forces)By Mandeep Kaur Sandhu
  • • Geological changes can be long time or short time.
  • Epeirogenic diastrophicEndogenic Orogenic forces sudden
  • • Sudden forces
  • • Diastrophic forces (slow forces) – Epeirogenetic (continent origin) – Orogenic (mountain forming) epeirogenetic orogenic Tensional Upward (crustal (emergence) Fracture) Compressional Downward (crustal (submrgence) Bending)
  • • Upward forces – Upliftment of continents – Upliftment of coastal land
  • • Downward movements – Submergence of land area (subsidence) – Submergence of land near coast(submergence)
  • • Orogenic forces are horizontal in nature either – opposite to each other (tensional or divergent forces)
  • • towards same direction (compressional or convergent ). • Crustal folding • Crustal warping
  • • Folds – Wave like bends – Due to tangential compressive forces – Anticlines and Synclines
  • • Types of Folds – Symmetrical folds – Due to regular and moderate forces
  • • Asymmetrical folds
  • • Monoclinal folds – More possible to cause faults at intense pressure of the horizontal forces.
  • • Isoclinal folds
  • • Recumbent folds
  • • Overturned folds
  • • Plunge folds
  • • Fan folds – Anticlorium and synclorium
  • • Faults – Crustal rocks are displaced – Due to tensional forces
  • • Types of Faults – Normal faults – Reverse faults – Lateral faults or strike faults – Step faults
  • Thanks …