Table T9. Control points used to calculate sedimentation rates at Site 1092. Notes: Code abbreviations: CN = calcareous nannofossil, DIAT = diatom, RAD = radiolaria, PMAG = magnetic polarity. Event abbreviations: FO = first occurrence, LO = last occurrence, LCO = lasr common occurrence, RE = reentrance, TOP = top of zone, BOT = bottom of zone. Code Event/Zone/Chron Depth range of stratigraphic datums Age Sedimentation Top Base Mean (Ma) Rates Leg Site Hole Core Type Section Interval (cm) Depth (mbsf) Depth (mcd) Leg Site Hole Core Type Section Interval (cm) Depth (mbsf) Depth (mcd) Depth (mbsf) Depth (mcd) (m/m.y.) CN acme E. huxleyi 177 1092 B 1 H 1 10 10 0.1 0.65 177 1092 B 1 H 1 60 60 0.6 1.15 0.35 0.9 0.085 ~10 CN FO E. huxleyi 177 1092 B 1 H 1 117 117 1.17 1.72 177 1092 B 1 H 2 10 10 1.6 2.15 1.38 1.93 0.26 ~10 CN LO P. lacunosa 177 1092 B 1 H 2 70 70 2.2 2.75 177 1092 B 1 H 2 126 126 2.76 3.31 2.48 3.03 0.46 ~10 DIAT TOP A. ingens Zone 177 1092 A 1 H 2 1 1 1.51 4.06 177 1092 A 1 H 3 1 1 3.01 5.56 2.26 4.81 0.65 ~10 RAD BOT Psi Zone 177 1092 C 1 H 0 7 12 3.99 3.99 177 1092 B 1 H 0 0 7 7.35 7.9 5.67 5.95 0.46 ~10 CN LO R. asanoi 177 1092 B 1 H 5 100 100 7 7.55 177 1092 B 2 H 1 44 44 7.84 8.69 7.42 8.12 0.88 ~29 CN Reent. Gephyrocapsa medium (4-5.5) 177 1092 B 2 H 1 44 44 7.84 8.69 177 1092 B 2 H 2 115 115 10.05 10.9 8.95 9.8 0.96 ~29 CN FO R. asanoi 177 1092 B 2 H 3 80 80 11.2 12.05 177 1092 B 2 H 4 80 80 12.7 13.55 11.95 12.8 1.08 ~29 CN LO Gephyrocapsa large (>5.5 µ) 177 1092 B 2 H 5 40 40 13.8 14.65 177 1092 B 2 H 6 30 30 15.2 16.05 14.5 15.35 1.24 ~29 DIAT TOP A. ingens Subzone a 177 1092 A 2 H 0 9 14 16.11 19.73 177 1092 A 3 H 2 1 1 19.01 23.74 17.56 21.73 1.3 ~29 CN FO Gephyrocapsa large (>5.5 µm) 177 1092 B 3 H 5 40 40 23.3 24.54 177 1092 B 3 H 5 140 140 24.3 25.54 23.8 25.04 1.46 ~29 CN FO Gephyrocapsa medium (4-5.5 ) 177 1092 B 4 H 3 140 140 30.8 32.01 177 1092 B 4 H 4 140 140 32.3 33.51 31.55 32.76 1.69 ~29 DIAT TOP P. barboi Zone 177 1092 C 4 H 0 0 5 32.07 35.3 177 1092 A 4 H 4 1 1 31.51 36.38 31.79 35.84 1.8 ~29 RAD BOT Chi Zone 177 1092 B 4 H 0 5 10 35.82 37.03 177 1092 A 4 H 0 4 14 36.74 41.61 36.28 39.32 1.92 ~29 DIAT TOP T. kolbei-F. matuyamae Zone 177 1092 A 4 H 5 1 1 33.01 37.88 177 1092 A 4 H 6 1 1 34.51 39.38 33.76 38.63 2 ~29 DIAT TOP T. vulnifica Zone 177 1092 A 5 H 5 1 1 42.51 48.38 177 1092 A 5 H 6 1 1 44.01 49.88 43.26 49.13 2.5 ~12 DIAT TOP T. insigna Zone 177 1092 A 5 H 6 1 1 44.01 49.88 177 1092 D 2 H 2 30 30 47.7 50.45 45.86 50.17 2.63 ~12 DIAT TOP F. interfrigidara Zone 177 1092 A 6 H 1 1 1 46.01 53.9 177 1092 D 2 H 5 10 10 51.8 54.55 48.91 54.22 3.26 ~12 CN LO R. pseudoumbilicus 177 1092 A 6 H 6 0 0 53.5 61.39 177 1092 A 6 H 6 100 100 54.5 62.39 54 61.89 3.66 ~12 DIAT BOT F. interfrigidara Zone 177 1092 A 7 H 1 1 1 55.51 64.2 177 1092 D 3 H 4 10 10 60 64.31 57.75 64.25 3.8 ~12 DIAT FO T. inura 177 1092 A 7 H 3 1 1 58.51 67.2 177 1092 A 7 H 4 1 1 60.01 68.7 59.26 67.95 4.92 ~15 DIAT TOP F. reinholdii Zone 177 1092 A 7 H 5 1 1 61.51 70.2 177 1092 A 7 H 6 1 1 63.01 71.7 62.26 70.95 6 ~15 RAD BOT A. challengerae Zone 177 1092 A 7 H 0 15 20 64.82 73.51 177 1092 A 8 H 0 11 16 73.72 83.17 69.27 78.34 6.58 ~15 PMAG BOT C4n 177 1092 A 9 H 4 80 80 79.8 81.6 177 1092 A 9 H 5 110 110 89.3 90.93 90.115 90.12 7.89 ~15 PMAG BOT C4r 177 1092 A 9 H 7 25 25 83.6 85.6 177 1092 A 10 H 2 10 10 93.35 96.14 94.745 94.75 8.53 ~15 DIAT BOT A. ing. var. ova. Zone 177 1092 A 9 H 3 1 1 77.46 86.79 177 1092 A 10 H 1 73 75 84.73 95.27 81.1 91.03 8.68 ~15 PMAG BOT C4An 177 1092 A 11 H 1 80 80 94.3 95.2 177 1092 A 11 H 2 20 20 106.79 107.69 107.24 107.24 8.86 ~15 RAD LO C. spongothorax 177 1092 C 10 H 0 14 19 89.74 97.42 177 1092 A 10 H 0 15 20 93.63 104.17 91.69 100.8 9.12 ~15 PMAG BOT C4Ar 177 1092 A 12 H 1 120 120 104.2 106.2 177 1092 A 12 H 3 20 20 116.61 118.61 117.61 117.61 9.78 ~15 DIAT TOP D. hustedtii Zone 177 1092 A 13 H 6 71 71 120.71 134.93 177 1092 A 14 H 1 118 118 123.18 139.3 121.95 137.12 10.23 ~38 RAD FO A. australis 177 1092 C 14 H 0 15 20 127.92 142.74 177 1092 A 14 H 0 10 15 131.11 147.23 129.52 144.98 10.36 ~38 DIAT TOP D. dimorpha Zone 177 1092 A 14 H 5 120 122 129.2 145.32 177 1092 A 15 H 5 120 122 138.7 156.94 133.95 151.13 10.63 ~38 PMAG BOT C5n 177 1092 A 15 H 5 30 30 137.8 139.1 177 1092 A 15 H 6 10 10 156.04 157.34 156.69 156.69 10.83 ~38 CN LO C. miopelagicus 177 1092 B 17 H 2 0 0 152 170.22 177 1092 A 17 H 5 0 0 155.93 174.15 153.97 172.18 10.94 ~4 CN LO C. nitescens 177 1092 A 17 H 0 32 37 158.51 176.73 177 1092 A 18 H 1 0 0 160 179.85 159.26 178.29 12.1 ~4 CN LO C. premacintyrei 177 1092 A 17 H 0 32 37 158.51 176.73 177 1092 A 18 H 1 0 0 160 179.85 159.26 178.29 12.7 ~4 DIAT TOP N. denticuloides Zone 177 1092 A 17 H 3 116 119 154.09 172.31 177 1092 A 18 H 1 120 123 161.2 181.05 157.65 176.68 12.84 ~4 CN LCO C. floridanus 177 1092 A 17 H 0 32 37 158.51 176.73 177 1092 A 18 H 1 0 0 160 179.85 159.26 178.29 13.2 ~4 RAD FO A. golownini 177 1092 B 17 H 0 23 28 157.96 174.82 177 1092 B 18 H 0 25 30 168.65 184.56 163.31 179.69 13.61 ~4 DIAT TOP A. ingens var. nodus Zone 177 1092 A 18 H 1 120 120 161.2 181.05 177 1092 A 18 H 5 120 120 167.2 187.05 164.2 184.05 14.17 ~4 DIAT TOP A.ingens/D.maccollum Zone 177 1092 A 18 H 5 120 123 167.2 187.05 177 1092 A 19 H 1 65 68 170.15 192.49 168.68 189.77 15.38 ~4 DIAT TOP D. maccollumii Zone 177 1092 A 19 H 1 65 65 170.15 192.49 177 1092 A 19 H 2 65 65 171.65 193.99 170.9 193.24 16.2 ~4 CN FO C. premacintyrei 177 1092 A 19 H 3 0 0 172.5 194.84 177 1092 A 19 H 4 0 0 174 196.34 173.25 195.59 17.4 ~4