Table T7. Summary of biohorizons at Site 1145.
| Code | Events | Depth range of stratigraphic datums | Age (Ma) |
Average
depth (mcd) |
Average
sedimentation rate (m/m.y.) |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Top | Bottom | ||||||||||
| Core, section, interval (cm) | Depth (mbsf) | Depth (mcd) | Core, section, interval (cm) | Depth (mbsf) |
Depth (mcd) | ||||||
| 184-1145A- | 184-1145A- | ||||||||||
| CN | FO E. huxleyi acme | 2H-CC, 9-14 | 10.11 | 11.94 | 3H-CC, 8-15 | 20.41 | 23.00 | 0.09 | 17.47 | 173 | |
| PF | LO pink G. ruber | 3H-CC, 8-15 | 20.41 | 23.00 | 4H-CC, 0-8 | 29.56 | 33.11 | 0.12 | 28.06 | ||
| CN | FO E. huxleyi | 6H-CC, 0-7 | 48.33 | 53.20 | 7H-CC, 36-43 | 58.76 | 64.40 | 0.26 | 58.80 | ||
| PF | FO pink G. ruber | 8H-CC, 19-26 | 67.98 | 73.62 | 9H-CC, 29-36 | 77.92 | 85.56 | 0.40 | 79.59 | ||
| CN | LO P. lacunosa* | 8H-CC, 19-26 | 67.98 | 73.62 | 9H-CC, 29-36 | 77.92 | 85.56 | 0.46 | 79.59 | ||
| BF | LO Stilostomella | 9H-CC, 29-36 | 77.92 | 85.56 | 10H-CC, 0-7 | 86.54 | 94.33 | 0.75 | 89.95 | 55 | |
| CN | LO C. macintyrei | 15X-CC, 54-59 | 129.19 | 140.54 | 16X-CC, 28-33 | 139.90 | 152.77 | 1.59 | 146.66 | ||
| PF | LO G. fistulosus | 15X-CC, 54-59 | 129.19 | 140.54 | 16X-CC, 28-33 | 139.90 | 152.77 | 1.77 | 146.66 | ||
| CN | LO D. brouweri | 17X-CC, 44-49 | 144.26 | 155.51 | 18X-2, 100 | 154.70 | 164.85 | 1.95 | 160.18 | ||
| PF | FO G. truncatulinoides | 17X-CC, 44-49 | 144.26 | 155.51 | 18X-CC, 31-36 | 161.41 | 171.58 | 2.00 | 163.55 | ||
| PF | LO G. multicamerata* | 19X-CC, 36-40 | 171.36 | 182.52 | 20X-CC, 46-50 | 180.84 | 192.10 | 2.4 | 187.31 | ||
| CN | LO D. pentaradiatus | 19X-CC, 36-40 | 171.36 | 182.52 | 20X-CC, 46-50 | 180.84 | 192.10 | 2.52 | 187.31 | 28 | |
| CN | LO D. tamalis | 20X-CC, 46-50 | 180.84 | 192.10 | 21X-CC, 19-25 | 190.39 | 201.97 | 2.83 | 197.04 | ||
| PF | LO S. seminulina* | 21X-CC, 19-25 | 190.39 | 201.97 | 22X-CC, 43-48 | 199.87 | 212.54 | 3.12 | 207.23 | ||
Notes: Sources of reference age for all biostratigraphic events are listed in Tables T2 and T3 in the "Explanatory Notes" chapter. CN = calcareous nannofossils, PF = planktonic foraminifers, BF = benthic foraminifers, FO = first occurrence, LO = last occurrence. * = events used in calculating average sedimentation rates. Depth for the top and bottom of biostratigraphic events = the mean of the sample interval. Bars in average sedimentation rate column indicate the range of samples to which the average sedimentation rate applies. Depth in bold indicates where datum is recorded; depth range between the top and bottom is the interval where the real bioevent may occur.