Which type of rock can be considered as a biological sedimentary rock?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Limestone.
- Biologic sedimentary rocks form when living organisms die, pile up, and are then compressed and cemented together.
- Types of biologic sedimentary rock include coal (accumulated plant material that is carbon-rich), or limestone and coquina (rocks made of marine organisms).