Question

Columnar joints are also called ___________

(a) Radial joints

(b) Pyramid joints

(c) Prismatic joints

(d) Box joints

I got this question in an interview for internship.

I'd like to ask this question from Occurrence of Joints in chapter Joints and Jointing of Engineering Geology

Answer 1

Right choice is (c) Prismatic joints

The best I can explain: Columnar joints are also called as prismatic joints. The joints divide the rock mass into polygonal blocks each block being bounded by three to eight sides.