Oxygen Isotopic Composition of Some Right-and Left-Coiled Foraminifera

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Science  22 May 1964:
Vol. 144, Issue 3621, pp. 1004-1005
DOI: 10.1126/science.144.3621.1004


Right-and left-coiled foraminiferal species were collected from living and fossil faunas from different habitats. A difference in the oxygen isotopic composition of right-and left-coiled specimens was observed. Deposition of calcium carbonate by right-and left-coiled Foraminifera takes place, at least in the species measured, during non-coincident periods of the year.