Coral Chronometers: Seasonal Growth Bands in Reef Corals
- 21 July 1972
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 177 (4045) , 270-272
- https://doi.org/10.1126/science.177.4045.270
Abstract
Autoradiographs and x-radiographs have been made of vertical sections through the centers of reef corals from Eniwetok. Radioactivity bands in the coral structure are caused by strontium-90 and are related to specific series of nuclear tests, thus making possible calculation of long-term growth rates. These data indicate that the cyclic variations in radial density revealed by x-radiography are annual.Keywords
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