Question

In which rock, joints may be classified on the basis of their lineation?

(a) Sedimentary

(b) Igneous

(c) Metamorphic

(d) Igneous and metamorphic

I had been asked this question in a job interview.

This interesting question is from Classification of Joints topic in chapter Joints and Jointing of Engineering Geology

Answer 1

Correct answer is (d) Igneous and metamorphic

To explain I would say: In igneous and metamorphic rocks, the joints may be classified on the basis of their geometric relations with planar structures of those rocks such as lineation or cleavage.