Young Blonde Girl With Blue Eyes Takes Off Her Bra Near Sedimentary Rocks At The Sea Coast

Biochemical sedimentary rocks are created when organisms use materials dissolved in air or water to build their tissue. Examples include:
- Most types of limestone are formed from the calcareous skeletons of organisms such as corals, mollusks, and foraminifera.
- Coal which forms as plants remove carbon from the atmosphere and combine with other elements to build their tissue.
- Deposits of chert formed from the accumulation of siliceous skeletons from microscopic organisms such as radiolaria and diatoms.