Question

Q. Consider the following statements with reference to sedimentary rocks:

1. They provide a record of Earth's history.
2. They contain important mineral resources.
3. They contain fossils, providing a history of life including human evolution.

Which of the above statements is/are correct?

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

Answer 1

The correct option is D

1, 2 and 3
Sedimentary rocks make up about three-quarters of the rocks at the Earth's surface.
All statements are correct: Sedimentary rocks preserve a record of the environments that existed when they formed. By looking at sedimentary rocks of different ages, scientists can figure out how climate and environments have changed through Earth's history. Fossils of ancient living things are preserved in sedimentary rocks too. Quartz, K-feldspar and muscovite are some of the important minerals found there.