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Which of the following processes do not come under diastrophism ?

  • A.Orogenic
  • B.Heterogenic
  • C.Earthquakes
  • D.Plate Tectonics

Answer: B

The process that does not come under diastrophism is Heterogenic.

Diastrophism covers all processes that move, raise or build up parts of the Earth's crust. The NCERT geography text lists them as orogenic processes (mountain building through severe folding), epeirogenic processes (uplift or warping of large parts of the crust), earthquakes (local, relatively minor movements) and plate tectonics (horizontal movements of crustal plates).

Orogenic, earthquakes and plate tectonics are therefore all diastrophic. 'Heterogenic' is not one of these processes; the term that belongs in the list is epeirogenic.

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