**Figure
F4.** Power spectra of log density in the depth domain. **A.**
Site 1081, 259 mbsf, with a calculated sedimentation rate of 51 m/m.y. and an
age of ~4.4 Ma. The autocorrelation window (ACW) length is 512 points, and a
fast Fourier transform (FFT) window length is 1024 points. **B.**
Site 1082, 375 mbsf, with a calculated SR value of 164 m/m.y. and an age of ~3.1
Ma, using the same ACW and FFT lengths. **C.** Site 1084, 467 mbsf,
with a calculated SR of 59 m/m.y. and an age of ~3.0 Ma, using the same ACW and
FFT lengths. Note the different alignment of spectral peaks with the main
orbital periods, induced by ACW and FFT window lengths, smooth factors, and
problems with aliasing.