Table 1. Depth position, position on the oxygen isotopic curve, and extrapolated ages of the sapropel layers at Site 975.
Sapropel
TOC
(%)
Depth
top
(mcd)
Depth
bottom
(mcd)
Age
top
(ka)
Age
bottom
(ka)
Duration
(k.y.)
Insolation
cycle
Isotopic
stage
501 1.54 9.65 9.76 122.18 122.82 0.64 12 5.5
502 1.10 15.37 15.415 163.22 163.78 0.56 ? 6.5
503 1.15 15.81 15.91 168.65 169.89 1.23 16 6.5
504 1.66 16.00 16.02 171.00 171.23 0.23 16 6.5
505 1.52 16.40 16.43 175.62 175.96 0.35 16 6.5
506 1.72 17.72 17.80 193.84 195.83 1.99 18 7.1
507 0.92 20.20 20.25 237.81 238.49 0.68 22 7.5
508 0.97 27.94 28.01 331.03 331.25 0.22 30 9.3
509 1.42 35.46 35.47 405.00 405.10 0.10 38 11.3
510 0.89 40.48 40.52 464.66 465.26 0.60 44 12.3
511 1.90 43.51 43.58 481.00 482.00 1.00 46 13.11
512 1.36 47.22 47.35 524.33 526.47 2.14 50 13.3
513 1.09 49.50 49.53 574.00 574.55 0.55 54 15.1
514 2.90 50.77 50.87 596.47 598.18 1.71 56 15.3
515 1.54 51.79 51.83 613.92 614.60 0.68 58 15.5
516 1.61 51.94 52.03 616.49 617.54 1.05 58 15.5
517 1.10 54.70 54.75 643.48 643.85 0.37 60 16.3
518 0.95 61.51 61.55 731.88 732.51 0.64 68 18.3
519 2.20 73.24 73.26 907.75 908.02 0.27 86 23
520 1.47 76.72 76.82 949.20 950.62 1.42 90 25
521 1.00 77.12 77.17 956.78 957.81 1.03 90 25
522 1.00 78.32 78.36 978.28 978.94 0.66 92 27
523 2.59 79.60 79.66 999.52 1000.52 1.00 94 27
524 1.33 81.06 81.14 1027.60 1028.67 1.07 96 29
525 2.69 83.74 83.82 1072.44 1073.98 1.54 100 31
526 1.06 84.73 84.74 1091.53 1091.72 0.19 102 31
527 1.38 85.63 85.65 1112.75 1113.13 0.38 104 33
528 2.02 90.65 90.67 1184.88 1185.22 0.34 112 35
529 1.99 92.77 92.80 1221.44 1221.78 0.33 116 37
530 1.08 101.52 101.55 1332.20 1332.60 0.41 128 41
531 1.59 105.93 105.95 1398.47 1398.79 0.32 134 45
532 0.84 106.63 106.65 1409.53 1409.84 0.32 136 46
533 0.99 113.02 113.11 1524.19 1525.05 0.86 148 51
534 1.06 126.11 126.12 1714.95 1715.08 0.13 168 60?
535 1.11 127.90 127.91 1737.79 1737.92 0.13 170 61
536 0.90 131.18 131.20 1807.61 1808.09 0.48 176 65

Notes: The sapropel numbers and TOC contents were obtained from the Leg 161 Initial Reports volume (Comas, Zahn, Klaus, et al., 1996) and Murat (Chap. 41, this volume). The insolation cycle numbering is based on the astronomical solution of Laskar (1990).