What is a small region with definite thickness and distinct composition

what-is-a-small-region-with-definite-thickness-and-distinct-composition

What is a small region with definite thickness and distinct composition having numerous closely placed parallel fractures called?

A. Shear zone

B. Fault zone

C. Fracture zone

D. Slikensides

This question was addressed to me in an interview.

My question is based upon Fault Terminology topic in portion Faults and Faulting of Engineering Geology

The correct choice is B. Fault zone

The best explanation: Fault zone is a small region with definite thickness and distinct composition having numerous closely placed parallel fractures within itself along which there have been clear displacements.