Which is not a type of fault?

A. normal

B. reverse

C. diagonal

D. transform

Option (C)

Explanation:

A fault is defined as the fracture along which the blocks of rock move. This fracture can be linear or curved. The force of compression and tension acts on the rocks along this fracture, as a result of which, one of the block moves up or down relative to the other.

There are various types of fault such as -

(1) Normal fault - here the hanging wall moves down in comparison to the footwall.

(2) Thrust fault - here the hanging wall moves up in comparison to the footwall.

(3) transform fault - When two lithospheric plates slide past one another it forms a transform plate boundary. For example the San Andreas fault.

There is no such type of diagonal fault.

Thus, the correct answer is option (C).