Figure F8. Comparison of benthic d18O and d13C records from Sites 1237 and 1241 for the time interval from 4 to 6 Ma. Oxygen and carbon isotope stages are numbered following the numbering scheme of Shackleton et al. (1995), which is firmly linked to the underlying 41-k.y. isotope cycles. Even numbers indicate cold stages and odd numbers indicate warm stages. The letters in front of the marine isotope stages identify the magnetic polarity interval. For example, the first cold stage of Sidufjall Chron is called Si2 and the first cold stage occurring in the magnetic interval between Sidufjall and Thvera is called ST2. These signatures indicate the match of isotope stages that correspond to the underlying and continuously numbered orbital obliquity cycles. PDB = Peedee belemnite.

Figure F8. Comparison of benthic

¹⁸O and

¹³C records from Sites 1237 and 1241 for the time interval from 4 to 6 Ma. Oxygen and carbon isotope stages are numbered following the numbering scheme of Shackleton et al. (1995), which is firmly linked to the underlying 41-k.y. isotope cycles. Even numbers indicate cold stages and odd numbers indicate warm stages. The letters in front of the marine isotope stages identify the magnetic polarity interval. For example, the first cold stage of Sidufjall Chron is called Si2 and the first cold stage occurring in the magnetic interval between Sidufjall and Thvera is called ST2. These signatures indicate the match of isotope stages that correspond to the underlying and continuously numbered orbital obliquity cycles. PDB = Peedee belemnite.