Consider the following pairs with reference to sedimentary rocks and the process of their formation : Sedimentary Rock Process of Formation 1. Chert — Chemically formed 2. Geyserite — Organically formed 3. Shale — Mechanically formed Which of the pairs given above is/are correctly matched ?

  1. A. 1 only
  2. B. 1 and 2 only
  3. C. 2 and 3 only
  4. D. 1, 2 and 3

Correct Answer: D. 1, 2 and 3

Explanation

According to typical physical geography classifications, shale is mechanically formed, chert is chemically formed, and geyserite/chalk/coal are considered organically formed sedimentary rocks.

Related questions on Geography

Practice more NDA GAT questions