What is coral dating
The majority of the coral’s energy needs are provided by tiny algae called zooxanthellae, which live inside the coral and produce food using the sun’s energy from carbon dioxide and water.
The protist algae and the coral animals live together in a symbiotic relationship.
A number of radioactive isotopes are used for this purpose, and depending on the rate of decay, are used for dating different geological periods.
More slowly decaying isotopes are useful for longer periods of time, but less accurate in absolute years.
Corals also use their tentacles to capture tiny marine animals called plankton.Nonradioactive absolute chronometers may conveniently be classified in terms of the broad areas in which changes occur—namely, geologic and biological processes, which will be treated here.During the first third of the 20th century, several presently obsolete weathering chronometers were explored.Biostratigraphy does not directly provide an absolute age determination of a rock, but merely places it within an interval of time at which that fossil assemblage is known to have coexisted.
Both disciplines work together hand in hand however, to the point where they share the same system of naming rock layers and the time spans utilized to classify layers within a stratum.
By combining multiple geochronological (and biostratigraphic) indicators the precision of the recovered age can be improved.