The GATE Grind

GATE 2021 MN – Question 27

Mining Geology, Mine Development and Surveying · Mining Geology · 1 mark · Multiple choice

Folds primarily result from which deformation process?

  1. Ductile deformation of the Earth’s crust
  2. Brittle deformation of the Earth’s crust
  3. High-impact tectonic stresses
  4. Fracturing of the Earth’s crust

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Show answer and explanation

Correct answer: (A) Ductile deformation of the Earth’s crust

Explanation

Folding bends rock layers through ductile deformation without requiring a through-going fracture, A. Faulting and jointing are characteristic brittle responses. Stress magnitude alone does not define a fold without the associated deformation mode.

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