Table T7. Summary of biohorizons at Site 1148.
| 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) | ||||||
| 184-1148A- | 184-1148A- | ||||||||||
| CN | FO E. huxleyi acme | 1H-CC, 7-13 | 0.70 | 0.70 | 2H-CC, 15-22 | 10.41 | 15.26 | 0.09 | 7.98 | 75 | |
| PF | LO pink G. ruber | 1H-CC, 7-13 | 0.70 | 0.70 | 2H-CC, 15-22 | 10.41 | 15.26 | 0.12 | 7.98 | ||
| CN | FO E. huxleyi | 3H-CC, 6-13 | 19.89 | 24.73 | 4H-CC, 30-37 | 29.50 | 34.35 | 0.26 | 29.54 | ||
| PF | FO pink G. ruber | 3H-CC, 6-13 | 19.89 | 24.73 | 4H-CC, 30-37 | 29.50 | 34.35 | 0.40 | 29.54 | ||
| CN | LO P. lacunosa | 3H-CC, 6-13 | 19.89 | 24.73 | 4H-CC, 30-37 | 29.50 | 34.35 | 0.46 | 29.54 | ||
| BF | LO Stilostomella | 5H-CC, 0-6 | 38.81 | 43.66 | 6H-CC, 22-29 | 48.70 | 54.50 | 0.75 | 49.08 | ||
| CN | LO R.asanoi | 6H-CC, 22-29 | 48.70 | 54.50 | 7H-CC, 0-10 | 57.67 | 64.59 | 0.83 | 59.55 | ||
| CN | LO small Gephyrocapsa acme | 7H-CC, 0-10 | 57.69 | 64.59 | 8H-CC, 13-18 | 67.49 | 74.85 | 1.01 | 69.72 | ||
| CN | FO R. asanoi | 8H-CC, 13-18 | 67.48 | 74.85 | 9H-CC, 19-26 | 76.91 | 84.61 | 1.16 | 79.73 | ||
| CN | FO small Gephyrocapsa acme | 10H-CC, 18-25 | 86.68 | 94.35 | 11H-CC, 4-11 | 95.97 | 104.69 | 1.22 | 99.52 | ||
| CN | LO C. macintyrei | 12H-CC, 0-7 | 105.67 | 115.34 | 13H-CC, 9-16 | 114.66 | 125.76 | 1.59 | 120.55 | ||
| PF | LO G. fistulosus | 12H-CC, 0-7 | 105.67 | 115.34 | 13H-CC, 9-16 | 114.66 | 125.76 | 1.77 | 120.55 | 16 | |
| CN | FO medium Gephyrocapsa spp.* | 12H-CC, 0-7 | 105.67 | 115.34 | 13H-CC, 9-16 | 114.66 | 125.76 | 1.69 | 120.55 | ||
| CN | LO D. brouweri | 13H-CC, 9-16 | 114.66 | 125.76 | 14H-CC, 0-8 | 123.93 | 135.49 | 1.95 | 130.63 | ||
| PF | FO G. truncatulinoides | 13H-CC, 9-16 | 114.66 | 125.76 | 14H-CC, 0-8 | 123.93 | 135.49 | 2.00 | 130.63 | ||
| CN | LO D. pentaradiatus | 14H-CC, 0-8 | 123.94 | 135.49 | 15H-CC, 0-8 | 133.58 | 145.59 | 2.52 | 140.54 | ||
| CN | LO D. surculus | 15H-CC, 0-8 | 133.54 | 133.59 | 16H-CC, 0-8 | 143.21 | 155.44 | 2.53 | 144.52 | ||
| CN | LO D. tamalis | 16H-CC, 0-8 | 143.22 | 155.44 | 17X-CC, 31-38 | 153.10 | 165.32 | 2.83 | 160.38 | ||
| PF | LO G. altispira | 16H-CC, 0-8 | 143.22 | 155.44 | 17X-CC, 31-38 | 153.10 | 165.32 | 3.09 | 160.38 | ||
| PF | LO S. seminulina | 16H-CC, 0-8 | 143.22 | 155.44 | 17X-CC, 31-38 | 153.10 | 165.32 | 3.12 | 160.38 | ||
| PF | FO G. tosaensis | 16H-CC, 0-8 | 143.22 | 155.44 | 17X-CC, 31-38 | 153.10 | 165.32 | 3.35 | 160.38 | ||
| CN | LO Sphenolithus abies/neoabies | 17X-CC, 31-38 | 153.10 | 165.32 | 18X-CC, 44-51 | 161.54 | 173.76 | 3.66 | 169.54 | ||
| CN | LO R. pseudoumbilicus | 17X-CC, 31-38 | 153.10 | 165.32 | 18X-CC, 44-51 | 161.54 | 173.76 | 3.82 | 169.54 | ||
| PF | Pulleniatina (sin. to dex. coiling change) | 17X-CC, 31-38 | 153.10 | 165.32 | 18X-CC, 44-51 | 161.54 | 173.76 | 3.95 | 169.54 | ||
| PF | LO G. nepenthes | 18X-CC, 44-51 | 161.54 | 173.76 | 19X-CC, 21-27 | 172.30 | 184.52 | 4.2 | 179.14 | ||
| CN | LO A. tricorniculatus | 18X-CC, 44-51 | 161.54 | 173.76 | 19X-CC, 21-27 | 172.30 | 184.52 | 4.56 | 179.14 | ||
| CN | LO C. acutus | 17X-CC, 31-38 | 153.10 | 165.32 | 18X-CC, 44-51 | 161.54 | 173.76 | 4.99 | 169.54 | ||
| CN | LO T. rugosus | 19X-CC, 21-27 | 172.30 | 184.52 | 20X-CC, 0-7 | 181.60 | 193.82 | 5.23 | 189.17 | ||
| CN | FO C. acutus | 18X-CC, 44-51 | 161.54 | 173.76 | 19X-CC, 21-27 | 172.30 | 184.52 | 5.37 | 179.14 | ||
| CN | LO D. quinqueramus | 19X-CC, 21-27 | 172.30 | 184.52 | 20X-CC, 0-7 | 181.60 | 193.82 | 5.54 | 189.17 | ||
| PF | FO S. dehiscens s.l. | 19X-CC, 21-27 | 172.30 | 184.52 | 20X-CC, 0-7 | 181.60 | 193.82 | 5.54 | 189.17 | ||
| PF | FO G. tumida | 20X-CC, 0-7 | 181.60 | 193.82 | 21X-CC, 30-37 | 191.61 | 203.83 | 5.82 | 198.83 | ||
| CN | LO A. amplificus | 20X-CC, 0-7 | 181.60 | 193.82 | 21X-CC, 30-37 | 191.61 | 203.83 | 5.99 | 198.83 | ||
| PF | FO G. conglobatus | 21X-CC, 30-37 | 191.61 | 203.83 | 22X-CC, 26-33 | 201.26 | 213.48 | 6.2 | 208.66 | ||
| CN | FO A. amplificus | 21X-CC, 30-37 | 191.61 | 203.83 | 22X-CC, 26-33 | 201.26 | 213.48 | 6.76 | 208.66 | ||
| CN | FO A. primus | 22X-CC, 26-33 | 201.26 | 213.48 | 23X-CC, 13-20 | 210.72 | 222.94 | 7.39 | 218.21 | ||
| CN | FO D. quinqueramus | 24X-CC, 41-48 | 219.62 | 231.84 | 25X-CC, 32-39 | 230.19 | 242.41 | 8.2 | 237.13 | ||
| CN | FO D. pentaradiatus | 27X-CC, 45-52 | 249.44 | 261.66 | 28X-CC, 23-30 | 259.04 | 271.26 | 8.55 | 266.46 | ||
| PF | FO G. plesiotumida | 27X-CC, 45-52 | 249.44 | 261.66 | 28X-CC, 23-30 | 259.04 | 271.26 | 8.58 | 266.46 | ||
| PF | FO G. extremus | 27X-CC, 45-52 | 249.44 | 261.66 | 28X-CC, 23-30 | 259.04 | 271.26 | 8.58 | 266.46 | ||
| CN | LO D. hamatus | 26X-CC, 40-47 | 238.89 | 251.11 | 27X-CC, 45-52 | 249.44 | 261.66 | 9.4 | 256.39 | ||
| CN | FO D. hamatus | 27X-CC, 45-52 | 249.44 | 261.66 | 28X-CC, 23-30 | 259.04 | 271.26 | 10.38 | 266.46 | ||
| PF | LO G. mayeri | 28X-CC, 23-30 | 259.04 | 271.26 | 29X-CC, 26-33 | 267.24 | 279.46 | 10.49 | 275.36 | ||
| CN | FO C. coalithus | 29X-CC, 26-33 | 267.24 | 279.46 | 30X-CC, 29-36 | 278.21 | 290.43 | 10.79 | 284.95 | ||
| PF | FO G. nepenthes | 29X-CC, 26-33 | 267.24 | 279.46 | 30X-CC, 29-36 | 278.21 | 290.43 | 11.19 | 284.95 | ||
| CN | FO D. kugleri | 30X-CC, 29-36 | 278.21 | 290.43 | 31X-CC, 40-47 | 287.82 | 300.04 | 11.8 | 295.24 | ||
| CN | FO T. rugosus | 31X-CC, 40-47 | 287.82 | 300.04 | 32X-CC, 16-26 | 297.26 | 309.50 | 12.62 | 304.77 | ||
| CN | LO Cy. floridanus | 31X-CC, 40-47 | 287.82 | 300.04 | 32X-CC, 16-26 | 297.26 | 309.50 | 13.19 | 304.77 | ||
| CN | LO S. heteromorphus | 31X-CC, 40-47 | 287.82 | 300.04 | 32X-CC, 16-26 | 297.26 | 309.50 | 13.57 | 304.77 | ||
| PF | FO Orbulina spp. | 32X-CC, 16-26 | 297.28 | 309.50 | 33X-CC, 21-31 | 307.00 | 319.24 | 15.1 | 314.37 | ||
| CN | LO H. ampliaperta | 33X-CC, 21-31 | 307.02 | 319.24 | 34X-CC, 30-37 | 316.74 | 328.96 | 15.6 | 324.10 | ||
| PF | FO P. sicana | 36X-CC, 35-42 | 336.06 | 348.28 | 37X-CC, 19-26 | 345.52 | 357.74 | 16.4 | 353.01 | ||
| PF | LO C. dissimilis* | 38X-CC, 32-39 | 355.13 | 367.35 | 39X-CC, 26-33 | 364.68 | 376.90 | 17.3 | 372.13 | ||
| CN | FO S. heteromorphus | 38X-CC, 32-39 | 355.13 | 367.35 | 39X-CC, 26-33 | 364.68 | 376.90 | 18.2 | 372.13 | ||
| CN | LO S. belemnos | 38X-CC, 32-39 | 355.13 | 367.35 | 39X-CC, 26-33 | 364.68 | 376.90 | 18.3 | 372.13 | 14 | |
| PF | FO G. praescitula | 39X-CC, 26-33 | 364.68 | 376.90 | 40X-CC, 26-33 | 374.25 | 386.47 | 18.5 | 381.69 | ||
| CN | FO S. belemnos | 40X-CC, 26-33 | 374.25 | 386.47 | 41X-CC, 40-47 | 384.16 | 396.38 | 19.2 | 391.43 | ||
| PF | LO P. kugleri | 42X-CC, 24-31 | 393.49 | 405.71 | 43X-CC, 36-43 | 403.15 | 415.37 | 21.5 | 410.54 | ||
| CN | FO D. druggii | 49X-CC, 48-55 | 460.52 | 472.74 | 50X-CC, 34-41 | 465.12 | 477.34 | 23.2 | 475.04 | ||
| PF | FO G. dehiscens | 47X-CC, 41-48 | 442.13 | 454.35 | 48X-CC, 20-27 | 450.38 | 472.74 | 23.2 | 463.55 | ||
| PF | FO P. kugleri* | 47X-CC, 41-48 | 442.13 | 454.35 | 48X-CC, 20-27 | 450.38 | 472.74 | 23.8 | 463.55 | ||
| PF | FO P. pseudokugleri | 49X-CC, 48-55 | 460.52 | 472.74 | 50X-CC, 34-41 | 465.12 | 477.34 | 25.9 | 475.04 | 61 | |
| PF | LO P. opima opima | 49X-CC, 48-55 | 460.52 | 472.74 | 50X-CC, 34-41 | 465.12 | 477.34 | 27.1 | 475.04 | ||
| CN | LO S. distentus* | 49X-CC, 48-55 | 460.52 | 472.74 | 50X-CC, 34-41 | 465.12 | 477.34 | 27.5 | 475.04 | ||
| PF | LO C. cubensis (common) | 52X-CC, 30-37 | 473.44 | 485.66 | 53X-CC, 30-37 | 478.72 | 490.94 | 28.5 | 488.30 | ||
| PF | FO G. angulosuturalis | 65X-CC, 27-34 | 581.41 | 593.63 | 66X-CC, 33-40 | 597.46 | 609.68 | 29.4 | 601.66 | ||
| CN | FO S. ciperoensis | 66X-CC, 33-40 | 597.46 | 609.68 | 67X-CC, 30-37 | 607.78 | 620.00 | 29.9 | 614.84 | ||
| PF | LO T. ampliapertura | 68X-CC, 24-31 | 617.43 | 629.65 | 69X-CC, 36-43 | 627.05 | 639.27 | 30.3 | 634.46 | ||
| PF | FO P. opima opima* | 71X-CC, 37-43 | 646.32 | 658.54 | 72X-CC, 34-40 | 655.87 | 668.09 | 30.6 | 663.32 | ||
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 rate. Depth for the top and bottom of biostratigraphic events = the mean of the sample interval. Depth in bold indicates where biohorizon is recorded in the studied samples; depth range between the top and bottom is the interval where the real bioevent may occur. Bars in average sedimentation rate column indicate the range of samples to which the average sedimentation rate applies.