Question

What is the fault angle of the thrust faults?

(a) More than 45°

(b) Less than 45°

(c) Lesser than 60°

(d) More than 90°

I had been asked this question by my college professor while I was bunking the class.

This key question is from Classification of Faults in section Faults and Faulting of Engineering Geology

Answer 1

Right choice is (b) Less than 45°

Best explanation: Thrust faults are the types of reverse faults in which the hanging wall has moved up relative to the foot wall and the faults dip at angles below 45 degrees. Faults dipping above 45 degrees with hanging wall having gone up are then called as reverse faults.