Coral Organisms

• In construction
s on land provide lime or use as building blocks ("coral rag"). Coral rag is an important local building material in places such as the East African coast.
• In climate research
The annual growth bands in bamboo corals and others allow geologists to construct year-by-year chronologies, a form of incremental dating, which underlie high-resolution records of past climatic and environmental changes using geochemical techniques.