Table 2.
TimeOptMCMC reconstructed sedimentation rate, precession and eccentricity frequencies, fundamental frequencies (g terms), precession constant (k), and Earth–Moon distance, for the Proterozoic Xiamaling Formation and the Eocene Walvis Ridge
| Parameter | Today* | Xiamaling Formation† | ±σ | Walvis Ridge‡ | ±σ |
| Sedimentation rate (cm/ky) | — | 0.357 | 0.005 | 1.316 | 0.011 |
| p1, ky | 23.678 | 14.392 | 14.178–14.613 | 23.335 | 23.121–23.554 |
| p2, ky | 22.371 | 13.899 | 14.407–13.983 | 22.066 | 21.874–22.261 |
| p3, ky | 18.951 | 12.497 | 12.673–12.327 | 18.613 | 18.448–18.781 |
| p4, ky | 19.103 | 12.569 | 12.744–12.398 | 18.848 | 18.685–19.013 |
| p5, ky | 23.120 | 14.192 | 14.407–13.983 | 22.827 | 22.608–23.050 |
| e1, ky | 405.091 | 405.077 | 406.971–403.201 | 405.613 | 403.969–407.270 |
| e2, ky | 94.932 | 94.912 | 96.028–93.821 | 91.975 | 91.099–92.867 |
| e3, ky | 123.945 | 123.955 | 125.868–122.100 | 118.946 | 117.483–120.447 |
| e4, ky | 98.857 | 99.211 | 100.386–98.064 | 98.009 | 97.161–98.871 |
| e5, ky | 130.781 | 131.392 | 133.467–129.380 | 129.236 | 127.752–130.755 |
| k, arcsec/y | 50.475838 | 85.790450 | 1.362320 | 51.280910 | 0.515371 |
| Earth–Moon distance, km × 103 | 384.4§ | 340.855800 | 1.293260 | 383.110800 | 0.822051 |
| h/d¶ | 23.93447 | 18.684750 | 0.126679 | 23.804850 | 0.123398 |
| g1, arcsec/y | 5.579378 | 5.531285 | 0.129246 | 5.494302 | 0.128076 |
| g2, arcsec/y | 7.456665 | 7.456848 | 0.014886 | 7.452619 | 0.013001 |
| g3, arcsec/y | 17.366595 | 17.320480 | 0.152805 | 17.480760 | 0.115325 |
| g4, arcsec/y | 17.910194 | 17.912240 | 0.158683 | 18.348310 | 0.135346 |
| g5, arcsec/y | 4.257564 | 4.257456 | 0.000020 | 4.257451 | 0.000020 |
*
Precession, eccentricity, g, and k estimates from ref. 2.
†
Results from the Xiamaling Formation are based on 50 MCMC simulation chains of length 1 × 106 each.
‡
Results from the Walvis Ridge are based on 150 MCMC simulation chains of length 2 × 105 each.
§
Semimajor axis.
¶
Sidereal day.