Q. Consider the following statements:

1. Sedimentary rocks are formed at Earth’s surface by the hydrological system
2. The formation of sedimentary rocks involves the weathering of pre-existing rocks
3. Sedimentary rocks contain fossils
4. Sedimentary rocks typically occur in layers

Which of the above statements is / are correct?
Answer: I, II, III and IV
Notes: Sedimentary rocks are formed by the accumulation or deposition of small particles and subsequent cementation of mineral or organic particles on the floor of oceans or other bodies of water at the Earth's surface. The formation process involves the weathering of pre-existing rocks and transportation of the geological detritus to the place of deposition by various agents. Sedimentary rocks do contain fossils, which are formed by bodies and parts of dead aquatic organisms. Moreover, these rocks are deposited in layers as strata, forming a structure called bedding.

This question is part of UPSC Daily 20 MCQ Series Course on GKToday Android app.