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      Ash layers from Iceland in the Greenland GRIP ice core correlated with oceanic and land sediments

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          Irregular glacial interstadials recorded in a new Greenland ice core

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            Greenland ice sheet evidence of post-glacial volcanism and its climatic impact

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              230Th-234U and 14C Ages Obtained by Mass Spectrometry on Corals

              In 1988, Fairbanks conducted a drilling expedition off the south coast of Barbados to recover submerged corals contemporaneous with the last deglaciation. Core recovery was excellent and >30 different samples were dated by conventional β-counting techniques (Fairbanks 1989). At about the same time, we developed, at Lamont, the thermal ionization mass spectrometry (TIMS) technique to obtain precise U-Th ages (Edwards 1988), and to compare them with the14C estimates measured on the same samples. A surprising result was that the discrepancy between14C and U-Th ages increased through time toca.3000–3500 yr atca.15,00014C BP (Bardet al.1990a). Because the three youngest samples yielded U-Th ages in agreement with their calibrated14C ages, we concluded initially that the TIMS U-Th determinations were not only precise, but also accurate, and that the14Cvs.U-Th data set could be used for a first-order14C calibration.
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                Author and article information

                Journal
                Earth and Planetary Science Letters
                Earth and Planetary Science Letters
                Elsevier BV
                0012821X
                October 1995
                October 1995
                : 135
                : 1-4
                : 149-155
                Article
                10.1016/0012-821X(95)00145-3
                e99ef0c1-93e5-49d4-a591-37d35eaf725f
                © 1995

                http://www.elsevier.com/tdm/userlicense/1.0/

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