Ocean sediment data - Ice Ages and Interglacials: Measurements, Interpretation, and Models - page 179

Figure 5.4. SPECMAP showing marine isotope stage numbers (adapted from M&M by
permission of Praxis Publishing).
Glacial periods are represented by even numbers. The only exception is a small
warming that was assigned as Stage 3 (see Figure 5.4 ) .
M&M claim that there is strong evidence that the sedimentation rate was
constant at Site 806 and no tuning was needed to establish the chronology. They
presented the data shown in Figure 5.5 . Huybers and Wunsch (2004) developed an
ocean sediment time series that included 21 sediment cores and that was corrected
for sediment compaction to avoid tuning in establishing the chronology. Site 806
was one of the 21 sites used. Roe (2006) used this time series to compare with the
astronomical theory (see Section 10.2.3).
Figure 5.5. d 18 O for Site 806 (adapted from M&M, p. 257, with permission of Praxis
Publishing).