The ratio of oxygen isotopes contained in the signal in deep-sea sediments can tell us a great deal about past ice-volume variations. The challenge is to disentangle the different contributions to the signal.
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Siddall, M. The riddle of the sediments. Nature 437, 39–41 (2005). https://doi.org/10.1038/437039a
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DOI: https://doi.org/10.1038/437039a
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