Site 1147 reached only 1.22-1.47 Ma at the bottom of the drilled holes, and only 11 datum levels were used for its chronostratigraphy: three paleomagnetic (Table T10), five nannofossil, two planktonic, and one benthic foraminiferal (Table T7) events.
Although the age covered is similar to that of Site 1144, the sedimentation rates and, in particular, the accumulation rates of Site 1147 are much less variable (Fig. F11) (also given as Synergy Software KaleidaGraph plots and Microsoft Excel data files [see the "Supplementary Materials" contents list]). The total sedimentation rate is higher in the last 0.26 m.y. (96 m/m.y.), but the carbonate and noncarbonate accumulation rates remain fairly constant throughout the hole and average ~0.7 g/cm2/k.y. and 4-5 g/cm2/k.y., respectively (Table T11).