Geochemistry and stable isotope record of benthic foraminifera of Miocene sediments, supplement to: Holbourn, Ann; Kuhnt, Wolfgang; Schulz, Michael; Erlenkeuser, Helmut (2005): Impacts of orbital forcing and atmospheric carbon dioxide on Miocene ice-sheet expansion. Nature, 438, 483-487

Ann Holbourn, Wolfgang Kuhnt, Michael Schulz & Helmut Erlenkeuser
The processes causing the middle Miocene global cooling, which marked the Earth's final transition into an 'icehouse' climate about 13.9 million years ago (Myr ago) (Flower and Kennett, 1993, doi:10.1029/93PA02196; 1995 doi:10.1029/95PA02022; Miller et al., 1991, doi:10.1029/90JB0201; Zachos et al., 2001, doi:10.1126/science.1059412), remain enigmatic. Tectonically driven circulation changes (Kennett, 1977, doi:10.1029/JC082i027p03843); Woodruff and Savin, 1991, doi:10.1029/91PA02561) and variations in atmospheric carbon dioxide levels (Raymo and Ruddimann, 1992, doi:10.1038/359117a0; Vincent and Berger, 1985) have been suggested...
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