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Biostratigraphy of large benthic foraminifera from Hole U1468A (Maldives): a CT-scan taxonomic approach

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Academic year: 2021

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Species (µm)PW (µm) PH (µm) PL (µm) PS (µm)DW (µm)DH DR (µm)SW (µm)IPP ∑ACII(µm) EEP(µm) NACII NPAC F Diameter(µm) Thickness(µm) T/D Ai B∑ACII N. ex. interc. ruttenii-martini n. specimens 21 21 21 21 21 21 21 21 21 21 21 21 21 21 20 20 20 21 21 Average 105 90 100 95 185 60 1.8 178 289 390 765 6.3 2 4 1170 620 0.5 61.2% 50.8% Dev.ST 20 20 15 15 35 15 0.2 45 58 90 130 1.8 0 0 205 110 0.1 6.5% 8.4% Max 140 130 125 130 275 85 2.2 290 435 540 1100 10 2 4 1510 835 0.7 70% 64% Min 75 60 75 70 150 25 1.5 125 225 240 600 3 2 4 870 430 0.4 51% 34% N. ex. interc. isolepidinoides-sumatrensis n. specimens 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 Average 130 100 110 110 200 70 1.5 152 349 121 716 1.8 2 1 1180 445 0.3 43% 16.9% Dev.ST 27 20 20 25 45 20 0.2 37 73 48 121 0.5 0 0 315 375 0.2 5.7% 6% Max 170 130 145 145 255 100 1.8 205 455 175 890 2 2 1 1600 1000 0.6 50% 23% Min 105 80 90 95 150 50 1.4 120 295 55 600 1 2 1 835 230 0.2 38% 8%

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Species (µm)PW (µm)PH (µm) PL (µm) PS (µm)DW (µm)DH DR X PC S4+5 SA Diameter(µm) Thickness(µm) T/D C. annulatus n. specimens 12 12 12 12 12 12 12 12 12 10 10 7 12 7 Average 195 165 200 185 245 110 1.3 3 7.8 10.7 27 1710 530 0.4 Dev.ST 40 25 30 30 55 21 0.2 0 1.1 1.3 7 570 105 0.1 Max 260 210 240 225 300 145 1.4 3 9 13 38 2250 750 0.5 Min 145 110 155 135 140 70 1 3 6 9 20 980 375 0..2

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Species (µm)PW (µm)PH (µm) PL (µm) PS (µm)DW (µm)DH DR NC1 (µm)D1 X S3+4 S4+5 S10 Diameter(µm) Thickness(µm) T/D H. (V.) borneensis n. specimens 13 13 13 13 13 13 13 11 11 9 9 9 7 4 13 4 Average 210 185 210 200 250 105 1.2 13 1210 3 3.9 7 7 1750 630 0.3 Dev.ST 45 40 40 40 45 22 0.1 1.5 365 0 0.8 1.2 1.5 640 210 0.1 Max 285 255 280 270 320 140 1.4 15 1880 3 5 9 10 2400 1000 0.4 Min 150 130 145 145 165 65 1 11 800 3 3 5 6 950 290 0.2 Heterostegina (V.) sp. 1 n. specimens 5 5 5 5 5 5 5 5 5 5 5 5 4 3 5 3 Average 105 85 105 95 110 55 1.2 11.5 465 5.5 2 2.8 3.3 1820 760 0.4 Dev.ST 20 20 15 15 20 10 0.3 1.3 90 3 0 0.5 0.5 465 190 0.1 Max 120 100 120 110 135 65 1.5 13 565 7 2 3 4 2300 1050 0.5 Min 65 50 80 60 85 35 0.9 10 320 5 2 2 3 1300 585 0.3

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Species PW (µm) PH (µm) PL (µm) PS (µm) DW (µm) DH (µm) DR NC1 NC2 NC3 (µm)D1 (µm)D2 (µm)D3 BBA (°) Diameter (µm) Thickness (µm) T/D O. complanata n. specimens 5 5 4 4 5 5 5 5 5 3 5 5 3 5 5 5 5 Average 42 33 50 45 23 15 0.9 9 11 16 160 425 820 26 850 250 0.3 Dev.ST 9 8 8 8 20 9 0.3 0 1 1 75 200 400 5 300 115 0.05 Max 55 50 60 55 65 30 1.3 9.0 12.0 16.0 310 870 1600 30 1600 500 0.35 Min 30 30 40 35 20 10 0.6 9.0 10.0 13.0 140 400 750 15 750 190 0.2 O. cf. heterosteginoides n. specimens 4 4 4 4 4 4 4 4 3 - 4 3 - 4 4 4 4 Average 60 58 60 60 60 35 0.9 9.5 12 - 365 1160 - 39 1200 290 0.3 Dev.ST 8 10 10 8 11 12 0.1 0.5 0.5 - 65 350 - 16 180 95 0.1 Max 70 70 75 70 65 45 1.1 10 13 - 445 1450 - 63 1300 420 0.4 Min 50 45 50 50 40 15 0.8 9 12 - 280 730 - 25 900 190 0.2 Operculina. sp. 1 n. specimens 17 17 15 15 17 17 17 15 15 4 15 15 4 17 15 15 15 Average 35 31 40 35 29 15 0.8 9.0 11.0 14.0 170 420 725 26 825 375 0.5 Dev.ST 10 10 10 10 12 6 0.1 0.5 1 1.5 45 120 155 7 240 100 0.1 Max 55 50 60 55 55 30 1 9 12 15 270 660 900 38 1210 555 0.6 Min 25 20 30 25 20 9 0.6 8 10 12 110 300 590 17 400 230 0.3 Nummulitidae. sp. 1 n. specimens 15 15 12 12 13 13 13 14 16 12 14 16 12 16 16 16 16 Average 48 43 55 50 39 25 0.8 10 12 14 240 570 985 19 1160 580 0.5 Dev.ST 8 9 10 8 9 15 0.2 1 2 1 100 230 300 7 185 85 0.1 Max 65 70 70 70 55 75 1.1 13 17 16 500 1050 1650 36 1520 680 0.7 Min 40 35 45 40 20 10 0.5 9 10 13 140 290 600 13 840 345 0.4 A. lessonii n. specimens 15 15 14 14 11 11 11 10 10 9 10 10 9 18 20 19 19 Average 30 25 36 30 22 13 0.7 8 8 9 155 295 520 41 750 490 0.7 Dev.ST 5 4 5 4 10 4 0.4 1.5 1.5 2.5 26 75 200 14 210 135 0.1 Max 35 31 42 35 33 19 1.3 11 10 12 180 430 850 62 1150 730 0.9 Min 22 19 30 23 11 8 0.3 7 6 6 115 210 340 21 350 320 0.5 A. mammilla n. specimens 10 10 9 9 9 9 9 9 10 7 9 10 6 10 9 10 9 Average 42 35 45 42 45 25 1 11 13.5 15 230 580 855 55 940 445 0.5 Dev.ST 17 10 10 11 16 13 0.1 2.1 2 1.3 70 200 100 9 140 110 0.1 Max 80 55 70 67 80 55 1.1 15 16 16 375 875 975 68 1110 630 0.6 Min 20 20 35 32 30 15 0.9 9 10 13 170 370 750 44 755 285 0.4

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