carbonate sediments

Carbonate sediments are primarily composed of calcium carbonate, a mineral found in shells, corals, and other marine organisms. These sediments accumulate in oceans and lakes, often forming limestone and other rock types over geological time. They are important for understanding Earth's history, as they provide clues about past climate conditions, ocean chemistry, and biological activity. Carbonate sediments also play a key role in marine ecosystems, supporting diverse life forms, and contribute to processes such as the carbon cycle, which is crucial for regulating the planet's climate.