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Science 15 August 1975:
Vol. 189. no. 4202, pp. 555 - 557
DOI: 10.1126/science.189.4202.555
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Articles

Oxygen and Carbon Isotopes from Calcareous Nannofossils as Paleoceanographic Indicators

Stanley V. Margolis 1, Peter M. Kroopnick 1, David E. Goodney 2, Walter C. Dudley 3, and Maureen E. Mahoney 3

1 Department of Oceanography, Hawaii Institute of Geophysics, University of Hawaii, Honolulu 96822
2 Department of Chemistry, University of Hawaii
3 Department of Oceanography, Hawaii Institute of Geophysics

Oxygen-18 and carbon-13 analyses of well-preserved calcareous nannofossils have been compared with those of foraminifera contained in Cenozoic cores collected in the Southern Ocean during the Deep Sea Drilling Project. The results indicate that calcareous nannofossils deposit calcium carbonate at or near equilibrium with oceanic surface waters and that they can be used as paleotemperature indicators.


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