Abstract: Abstract Fluctuations in the 87 Sr 86 Sr ratio of seawater accompanying glacial/interglacial climate changes have been reported in recent studies but remain highly controversial. To investigate these potential fluctuations we present very high precision (13 ppm) 87 Sr 86 Sr measurements on planktonic foraminifera from Indian Ocean and Pacific cores. 87 Sr 86 Sr ratios from three different foraminiferal species are indistinguishable from one another in both core-top and 50 ka samples, demonstrating that changes due to diagenesis or contamination...
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Topics: 
Oceanography
Paleontology
Climatology