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Science 13 July 1979:
Vol. 205. no. 4402, pp. 186 - 188
DOI: 10.1126/science.205.4402.186
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Articles

Stable Isotopes in a Mollusk Shell: Detection of Upwelling Events

J. S. KILLINGLEY 1 and W. H. BERGER 1

1 Scripps Institution of Oceanography, University, of California, San Diego, La Jolla 92093

The California mussel Mytilus californianus records with high fidelity annual temperature variations of nearshore waters in the oxygen isotope composition of its shell. The onset and termination of upwelling events (and metabolic activity) are recorded in the associated carbon isotope signal, and the magnitude and timing of upwelling can be estimated. The method has implications for studying the history of upwelling and the life history of living and fossil mollusks and for analyzing shell midden deposits.

Submitted on December 15, 1978
Revised on March 20, 1979


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