Question

Which one of the following is NOT found in an extensional setting?

• A. Normal faults
• B. Horsts
• C. Rifts
• D. Thrust faults

Hint:

In extensional settings, you will find normal faults, rifts, and horsts. Thrust faults are characteristic of compressional settings.

Answer 1

The Correct Option is D

Step 1: Understanding the question.
The question is asking about the type of fault that is NOT typically associated with extensional tectonic settings. Extensional settings are characterized by stretching and thinning of the Earth's crust.

Step 2: Analyzing the options.
(A) Normal faults: Normal faults are typical in extensional settings where the crust is stretched.
(B) Horsts: Horsts are raised blocks of crust, which form in extensional settings, often between normal faults.
(C) Rifts: Rifts are zones of crustal stretching that also form in extensional settings.
(D) Thrust faults: Thrust faults are associated with compressional settings, not extensional ones, where the crust is shortened.

Step 3: Conclusion.
The correct answer is (D) Thrust faults because they are found in compressional settings, not extensional ones.