Figure F24. Preliminary time series analysis results from Site 1238 based on the biostratigraphic age model. A, B. Time series and corresponding spectra from 0 to 1 Ma (assuming a linear sedimentation rate between 0.0 and 58.2 mcd, as inferred from one biostratigraphic datum in this interval) of gamma ray attenuation (GRA) bulk density. C, D. Magnetic susceptibility. E, F. Lightness. The concentration of variance near the known orbital frequencies suggests that meter-scale lithologic banding is associated with orbital-scale climate variability. Gray bands = orbital frequencies.

Figure F24. Preliminary time series analysis results from Site 1238 based on the biostratigraphic age model. A, B. Time series and corresponding spectra from 0 to 1 Ma (assuming a linear sedimentation rate between 0.0 and 58.2 mcd, as inferred from one biostratigraphic datum in this interval) of gamma ray attenuation (GRA) bulk density. C, D. Magnetic susceptibility. E, F. Lightness. The concentration of variance near the known orbital frequencies suggests that meter-scale lithologic banding is associated with orbital-scale climate variability. Gray bands = orbital frequencies.