Question

The type of regular joint not belonging to igneous rocks is?

(a) Sheet jointing

(b) Box jointing

(c) Mural jointing

(d) Columnar jointing

The question was posed to me by my school principal while I was bunking the class.

This is a very interesting question from Occurrence of Joints in section Joints and Jointing of Engineering Geology

Answer 1

The correct answer is (b) Box jointing

For explanation I would say: The three regular or systematic types of joints observed in igneous rocks are: sheet joints, mural joints and columnar joints.