Question

Classify and describe different types of joints in rock with neat sketches.

Answer 1

Commonly, a large number of joints lie parallel to one another. These parallel joints to form a ‘joint- set’. A joint system consists of two or more joint sets.

Classification of Joints:

(A) On the basis of the origin joints may be classified into two groups.

They are:

1. Tension joints:

Tension joints are those, which are formed as a result of tension forces. These joints are relatively open and have rough and irregular surfaces.

ADVERTISEMENTS:

The columnar joints in lava flows and longitudinal joints in the anticline that run parallel to the axis of the fold are the examples of tension joints.