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Similar to earth movements Endogenic forces (20)
earth movements Endogenic forces
- 3. Epeirogenic
diastrophic
Endogenic
Orogenic
forces
sudden
- 5. • Diastrophic forces (slow forces)
– Epeirogenetic (continent origin)
– Orogenic (mountain forming)
epeirogenetic orogenic
Tensional
Upward
(crustal
(emergence)
Fracture)
Compressional
Downward
(crustal
(submrgence)
Bending)
- 8. • Downward movements
– Submergence of land area
(subsidence)
– Submergence of land near
coast(submergence)
- 9. • Orogenic forces are horizontal in nature
either
– opposite to each other (tensional or divergent
forces)
- 11. • towards same direction (compressional or convergent ).
• Crustal folding
• Crustal warping
- 13. • Folds
– Wave like bends
– Due to tangential compressive forces
– Anticlines and Synclines
- 16. • Types of Folds
– Symmetrical folds
– Due to regular and moderate forces
- 18. • Monoclinal folds
– More possible to cause faults at intense
pressure of the horizontal forces.
- 24. • Faults
– Crustal rocks are displaced
– Due to tensional forces
- 25. • Types of Faults
– Normal faults
– Reverse faults
– Lateral faults or strike faults
– Step faults