Question

Q. Consider the following statements

1. Orogenic processes involve mountain building whereas epeirogenic process involve uplift or warping of earth’s crust
2. In the process of epeirogeny, the crust is severely deformed into folds.

Which of the above statements is/are correct?

• A.
  1 only
• B.
  2 only
• C.
  Both 1 and 2
• D.
  Neither 1 nor 2

Answer 1

The correct option is A

1 only
Explanation:

Statement 1 is correct : Orogenic processes involve mountain building through severe folding and affecting long and narrow belts of the earth’s crust. Epeirogenic processes involve uplift or warping of earth’s crust.

Statement 2 is incorrect : In the process of orogeny, the crust is severely deformed into folds. Due to epeirogeny, there may be simple deformation involving uplift or warping of large parts of the earth’s crust.

Extra Information: Orogeny and Epeirogeny are the process through which Diastrophism happens. All the processes that move, elevate or build up portions of the earth’s crust come under diastrophism. Earthquakes and plate tectonics involving horizontal movement of crustal plates also come under diastrophism.