Figure F54. Preliminary time series analysis results from Site 1238 based on shipboard biostratigraphic age model. 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 (A, B) magnetic susceptibility; (C, D) GRA bulk density; and (E, F) lightness. Orbital frequencies are denoted by gray bands. The concentration of variance near the known orbital frequencies suggests that meter-scale lithologic banding is associated with orbital-scale climate variability.
Next Figure | Table of Contents