15.3 oxygen isotope record Lisiecki and Raymo 2005

Graph showing the oxygen isotope record for last 5 million years with regular cycles. More pronounced glacial cycles are in the last 1 million years.

A Pliocene‐Pleistocene stack of 57 globally distributed benthic δ18O records (Source: Lisiecki, L. E., & Raymo, M. E. (2005). A Pliocene‐Pleistocene stack of 57 globally distributed benthic δ18O records. Paleoceanography, 20(1).)

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