Question

Faults are generated by:
A. Shear forces,
B. Extensional forces,
C. Compressional forces,
D. Torsional forces. Choose the correct answer from the options given below:

• A. A and B only
• B. B and C only
• C. A and D only
• D. A, B, C and D

Hint:

Normal faults are related to extension, reverse faults to compression, and strike-slip faults to shear.

Answer 1

The Correct Option is D

Concept:
Faults are fractures in rocks along which displacement has taken place. They are produced by different types of tectonic forces.

Step 1: Shear forces.
Shear forces produce strike-slip or wrench faults. \[ A \text{ is correct} \]

Step 2: Extensional forces.
Extensional forces pull rocks apart and commonly produce normal faults. \[ B \text{ is correct} \]

Step 3: Compressional forces.
Compressional forces push rocks together and commonly produce reverse or thrust faults. \[ C \text{ is correct} \]

Step 4: Torsional forces.
Torsional forces can also contribute to fracturing and displacement of rocks. \[ D \text{ is correct} \] Thus, all given forces can generate faults. \[ \therefore \text{Correct Answer is (D)} \]