Coral Growth Rings

UV light illuminates growth rings in a cross-section of 44-year-old Primnoa resedaformis coral found about 400 m (1,312 ft) deep off Newfoundland.
Owen Sherwood

Ultraviolet light illuminates the growth rings in a cross-section of a 44-year-old deep-sea coral (Primnoa resedaeformis) collected off the coast of Newfoundland at about 1,300 feet (400 meters). Similar to tree trunks, cross-sections reveal coral-growth rings that can be used to determine their age—and information about climate. Because coral growth depends on temperature, sunlight, and nutrients, scientists can derive information about them from coral growth rate. Learn more about deep-sea corals and how they are used in scientific research at Coral Gardens of the Deep.

Tags: Corals