Table T6. Benthic foraminifer occurrences and paleobathymetric interpretations. (See table notes.)
|
Core, section, interval (cm) |
Depth (mbsf) |
Benthic foraminifer taxa | Preservation | Comments |
Paleodepth estimate (m) |
|---|---|---|---|---|---|
| 313-M0029A- | |||||
| 21R-CC, 0–3 | 85.61 | Barren | ? | ||
| 22R-CC, 0–4 | 94.76 | Barren | ? | ||
| 23R-CC, 0–2 | 116.13 | Barren | ? | ||
| 24R-CC, 8–10 | 118.54 | Barren | ? | ||
| 25R-CC, 0–2 | 146.01 | Barren | ? | ||
| 26R-CC, 13–15 | 149.98 | Barren | ? | ||
| 27R-CC, 0–3 | 152.01 | Barren | ? | ||
| 28R-CC, 14–17 | 156.18 | Barren | ? | ||
| 29R-CC, 13–15 | 158.51 | Barren | ? | ||
| 30R-CC, 0–2 | 160.81 | Barren | ? | ||
| 33R-CC, 0–2 | 188.72 | Barren | ? | ||
| 35R-CC, 8–10 | 195.12 | Barren | ? | ||
| 36R-CC, 0–2 | 219.28 | Lenticulina (1); polymorph (1); Cibicidoides (2); Alabamina (1); lots of Stilostomella fragments | P–G | Shells and foraminifers to Sr; rare foraminifers (none >250) | ? |
| 37R-CC, 13–15 | 224.23 | Barren | ? | ||
| 39R-CC, 0–2 | 228.26 | Barren | ? | ||
| 40R-CC, 12–14 | 231.99 | Barren | ? | ||
| 44R-CC, 0–1 | 262.37 | Barren | ? | ||
| 46R-CC, 0–1 | 268.12 | Barren | ? | ||
| 48R-CC, 0–1 | 274.24 | Barren | ? | ||
| 50R-CC, 0–1 | 282.81 | Barren | ? | ||
| 52R-CC, 16–18 | 286.65 | Barren | ? | ||
| 53R-CC, 11–14 | 292.27 | Barren | ? | ||
| 56R-CC, 15–17 | 295.49 | Barren | ? | ||
| 58R-CC, 7–8 | 303.16 | Pullenia bulloides (1); agglutinants (1); Cibicidoides (1); Stilostomella fragments, Nonionella pizarrensis (1); Nonionella sp. (1) | P–G | Rare foraminifers | ??25–50?? |
| 60R-CC, 0–3 | 310.49 | Hanzawaia (15); Buliminella gracilis (very good preservation) (3); Stilostomella (1); Gyroidinoides or Cibicidoides (1) | P–VG | 50–75 | |
| 62R-CC, 0–3 | 315.61 | Barren | ? | ||
| 63R-CC, 0–2 | 318.25 | Barren | ? | ||
| 64R-CC, 0–2 | 322.20 | Barren | ? | ||
| 67R-CC, 0–2 | 331.84 | R: marginulinid; A: Uvigerina juncea, Nonionella pizarrensis, Bolivina alazanensis; F–C: Buliminella gracilis, Hanzawaia; Pan: A: Buliminella gracilis, Bolivina | P–G | Abundant foraminifers | 80–100 |
| 68R-1,145–150 | 333.41 | A: Uvigerina juncea, Bolivina; R–F: Hanzawaia, Nonionella pizarrensis; R: marginulinid | P–G | Abundant foraminifers | 80–100 |
| 70R-CC, 0–2 | 341.04 | A: Lenticulina, Uvigerina juncea; C–A: Nonionella pizarrensis, Bolivina alazanensis; R: Dentalina | P–VG | Some pyritized Lent, Bol, and Uvig | 80–100 |
| 74R-2, 84–86 | 352.59 | Nonionella pizarrensis (9); marginulinid (1); Buliminella gracilis (4); Rectuvigerina lamelata (1) | P–G | Very small sample | 80–100 |
| 75R-CC, 21–23 | 354.37 | Barren | ? | ||
| 77R-CC, 18–20 | 358.72 | Uvigerina juncea (4); Bolivina alazanensis (4); Buliminella gracilis (2); Lenticulina (2); Nonionella pizarrensis (15) | P–G | 75–80 | |
| 78R-1, 148–153 | 360.89 | Barren | ? | ||
| 78R-CC, 0–3 | 362.49 | A: Nonionella pizarrensis; C: Lenticulina; F: Hanzawaia, R: Bolivina, Buliminella gracilis, Uvigerina juncea | P–G | Abundant foraminifers | 40–60 (to ?75) |
| 81R-CC, 0–2 | 371.83 | A: Nonionella pizarrensis; R: Lenticulina, Buliminella gracilis, Fissurina; C: Hanzawaia | P–E | Abundant foraminifers | 50–75 |
| 82R-CC, 13–15 | 374.31 | A: Lenticulina, Hanzawaia concentrica, Nonionella pizarrensis, Bolivina paula; C: Buliminella gracilis, Uvigerina juncea; R: Cibicidoides, polymorph, Stilostomella, Fissurina, Pararotalia | P–E | >100 (shallow end) | |
| 84R-CC, 19–20 | 380.91 | Barren | ? | ||
| 86R-CC, 17–18 | 386.82 | Barren | ? | ||
| 88R-CC, 12–14 | 392.56 | Barren | ? | ||
| 90R-CC, 7–9 | 399.00 | Barren | ? | ||
| 92R-CC, 0–2 | 404.92 | Lenticulina, (7); Dentalina (1); Nonionella pizarrensis (2); Bolivina (3); Buliminella gracilis (5); Uvigerina juncea (2) | P–E | 75–80 | |
| 94R-2, 149–151 | 411.20 | Barren | ? | ||
| 97R-3, 13–15 | 420.49 | Pan: A: Bolivina paula, Bolivina sp., Buliminella elegantissima, Buliminella gracilis (good preservation); Anomalinoides (1); Pararotalia (1); Buliminella gracilis (1) | P–G | 50–75 | |
| 99R-2, 128–130 | 426.24 | Barren | ? | ||
| 100R-CC, 32–34 | 429.83 | Buliminella gracilis (2); Uvigerina juncea (1); Nonionella pizarrensis (1); Pan: Bolivina, Buliminella gracilis | E | Rare foraminifers | 75–80 |
| 102R-CC, 13–15 | 435.26 | Barren | ? | ||
| 104R-CC, 0–4 | 439.83 | Barren | ? | ||
| 107R-3, 64–66 | 447.64 | Pan: Buliminella gracilis; A: Lenticulina, Nonionella pizarrensis, Buliminella gracilis, Uvigerina juncea; R: Fissurina, polymorph, Quinqueloculina, Pararotalia, Hanzawaia | P–E | Abundant foraminifers | 75–100 |
| 108R-CC, 0–5 | 451.22 | Pan: Buliminella gracilis, Bolivina; A: Uvigerina juncea, Buliminella gracilis, Bolivina floridana, Nonionella pizarrensis; C: Lenticulina; R: Bulimina mexicana | P–E | Abundant foraminifers | 75–100 |
| 109R-CC, 0–3 | 453.73 | Barren | ? | ||
| 110R-CC, 0–2 | 455.99 | Barren | ? | ||
| 111R-CC, 14–17 | 460.49 | Barren | ? | ||
| 112R-CC, 0–2 | 463.27 | Barren | ? | ||
| 114R-CC, 0–5 | 469.11 | Lenticulina, Hanzawaia concentrica/Hanzawaia hughesi (poor/good); Exc: Buliminella gracilis, Uvigerina juncea, Nonionella pizarrensis; Cibicidoides (poor) | P–E | 75–100 (dash 50–75) | |
| 116R-CC, 0–5 | 474.99 | Barren | ? | ||
| 119R-CC, 10–12 | 479.85 | A: Lenticulina, Hanzawaia concentrica, Uvigerina juncea, Bolivina floridana; F–C: Cibicidoides pachyderma; R: Cancris sagra, Nonionella pizarrensis, Oridorsalis, Cassidulina, Rectuvigerina lamelata, polymorph, Nonion | P–E | >100 | |
| 120R-CC, 13–15 | 484.42 | F–C: Cibicidoides pachyderma, Cibicidoides spp., Uvigerina juncea, Buliminella gracilis, Lenticulina, Hanzawaia mantaensis; R: agglutinants, Nonionella pizarrensis | P–G | Abundant foraminifers | >100 |
| 122R-CC, 0–2 | 490.52 | Barren | ? | ||
| 124R-2, 133–135 | 496.45 | P–G: Hanzawaia concentrica, Cibicidoides pachyderma, Uvigerina juncea; VG: Nonionella pizarrensis, Lenticulina | P–VG | Few to rare foraminifers | >100 or transported deepwater |
| 126R-CC, 17–19 | 502.61 | A: Hanzawaia concentrica (poor), Buliminella gracilis (exc); F: Nonionella pizarrensis (exc); R: Pararotalia, Uvigerina juncea (exc), Bolivina alazanensis, agglutinants, Cibicidoides (poor–good) | P–E | 50–75 | |
| 128R-CC, 10–12 | 509.09 | Barren | ? | ||
| 130R-CC, 0–2 | 514.88 | A: Lenticulina, Hanzawaia concentrica/Hanzawaia hughesi, Uvigerina juncea and Buliminella gracilis (exc pres); C: Nonionella pizarrensis; R: Cassidulina, Stilostomella; C–A: Cibicidoides (mod) | P–E | 100 | |
| 132R-CC, 0–4 | 521.17 | C–A: Lenticulina, Nonionella pizarrensis, Uvigerina juncea, Buliminella gracilis, Hanzawaia; F: Bolivina floridana, Cibicidoides pachyderma, Cibicidoides sp., agglutinants, miliolids, Pararotalia, Textularia, Stilostomella, Globobulimina sp. | E | Abundant foraminifers | >100 |
| 135R-CC, 0–2 | 528.20 | C–A: Lenticulina, Nonionella pizarrensis, Uvigerina juncea, Hanzawaia; F–C: Bolivina paula, Cibicidoides sp., polymorph, Stilostomella | E | Abundant foraminifers | >100 |
| 137R-CC, 14–16 | 533.70 | C–A: Lenticulina, Uvigerina juncea, Hanzawaia; C: Nonionella pizarrensis, Bulimina mexicana, Buliminella gracilis; F: Cibicidoides pachyderma, Cibicidoides sp., Cassidulina crassa, miliolid; Pan: Bolivina paula | E | >100 | |
| 139R-CC, 0–2 | 539.07 | A: Lenticulina, Uvigerina juncea, Nonionella pizarrensis, Hanzawaia; R: Buliminella gracilis, Rectuvigerina lamelata, polymorph | P–E | 75–100 | |
| 141R-CC, 0–5 | 545.36 | Barren | ? | ||
| 143R-CC, 8–10 | 551.55 | A: Rectuvigerina lamelata, Nonionella pizarrensis, Bolivina paula, Bolivina tectiformis, Buliminella gracilis; C: Lenticulina, Hanzawaia concentrica; R–F: Spiroloculina, Hanzawaia mantaensis; R: Globocassidulina subglobosa, Bulimina mexicana, Uvigerina; Pan: Buliminella gracilis | P–E | >100 | |
| 144R-1, 64–65 | 552.20 | A-Bolivina paula, Bolivina tectiformis; C–A: Rectuvigerina lamelata, Buliminella gracilis; R–F: Hanzawaia mantaensis, Uvigerina, Spirosigmoilina, Bulimina mexicana, Cibicidoides pachyderma | E | Very small sample | >100 |
| 145R-CC, 0–4 | 556.35 | A Nonionella pizarrensis, Uvigerina juncea; C: Buliminella gracilis, Lenticulina, Hanzawaia | P–E | 75–100 | |
| 146R-CC, 7–9 | 557.73 | Barren | ? | ||
| 148R-CC, 0–4 | 563.84 | Barren | ? | ||
| 150R-2, 149–151 | 569.80 | C–A: Lenticulina, Uvigerina, Nonionella pizarrensis, Buliminella gracilis, Cassindulina laevigata; R: Pararotalia, polymorph, Cibicidoides pachyderma; Pan: planktonic foraminfer, Buliminella gracilis | Abundant foraminifers | 75–100 (deeper than 145R-CC) | |
| 152R-CC, 0–2 | 576.02 | A: Lenticulina, Cassidulina laevigata; C: Nonionella pizarrensis; F–C: Buliminella gracilis; R–F: polymorph, Bulimina mexicana, Hanzawaia mantaensis, Hanzawaia concentrica/hughesi, Spirosigmoilina, Textularia, Cibicidoides spp. | P–E | Abundant planktonics and benthics | 50–75, dash to 100 |
| 154R-CC, 14–16 | 582.19 | Pan: A: Hanzawaia concentrica, Bolivina tectiformis; A: Uvigerina juncea, Bolivina paula, Buliminella gracilis; C: Nonionella pizarrensis; R: Rectuvigerina lamelata, Cassidulina laevigata, Hanzawaia concentrica | Abundant foraminifers | 75–100 | |
| 156R-CC, 0–3 | 588.19 | A: Uvigerina juncea, Bolivina paula; C: Buliminella gracilis, Nonionella pizarrensis, Lenticulina; R–F: Rectuvigerina lamelata, Bulimina mexicana, polymorph | G–E | 75–100 | |
| 158R-CC, 20–22 | 592.78 | Barren | ? | ||
| 161R-2, 150–152 | 603.38 | Barren | ? | ||
| 164R-CC, 0–5 | 612.47 | Barren | ? | ||
| 166R-CC, 0–4 | 618.81 | Barren | ? | ||
| 167R-2, 151–153 | 621.68 | A-Bolivina paula, Bolivina tectiformis; C: Buliminella gracilis, Hanzawaia concentrica (mod pres); F: Uvigerina; R: Globocassidulina subglubosa; Cassidulina laevigata | M–E | Abundant foraminifers | 50–75 |
| 169R-CC, 9–11 | 626.54 | Barren | ? | ||
| 170R-2, 150–152 | 630.82 | Barren | ? | ||
| 173R-1, 153–156 | 636.76 | Barren | ? | ||
| 176R-CC, 30–32 | 644.26 | Pan: Bolivina tectiformis, Buliminella gracilis, Uvigerina juncea, Stilostomella, Cibicidoides pachyderma; A: Uvigerina juncea; R: Buliminella gracilis, Textularia, Rectuvigerina lamelata; F–R: Hanzawaia concentrica/hughesi | G–E | Very small sample | 75–100 (deep end) |
| 178R-CC, 0–3 | 652.52 | C–A: Lenticulina, Nonionella pizarrensis, Hanzawaia concentrica/hughesi, Uvigerina juncea, Buliminella gracilis; F–C: Cibicidoides pachyderma, Textularia, Gyroidinoides, Pararotalia, Chilostomella, Fursenkoina | P–G | 100 with downslope tranport; low O2 porewater | |
| 179R-CC, 0–4 | 652.14 | Barren | ? | ||
| 181R-2, 88–90 | 657.64 | A: Uvigerina juncea, F–C: Hanzawaia, Nonionella pizarrensis, Buliminella gracilis; few foraminifers in pan: Nonionella pizarrensis, Buliminella gracilis, Bolivina tectiformis | E | Very small sample | 75–100 |
| 183R-CC, 0–2 | 664.27 | Barren | ? | ||
| 189R-CC, 16–18 | 675.22 | Uvigerina juncea (3); Nonionella pizarrensis (3); Hanzawaia (2); Lenticulina (3); Cibicidoides pachyderma (2); Bolivina (5); Buliminella gracilis (1); Buliminella sp. (2); Spirosigmoilina (2); Tritaxia (1) | G–E | Very small sample | 75–100 (deep end) |
| 192R-CC, 15–17 | 686.21 | Uvigerina juncea (5); Cibicidoides pachyderma (4); Nonionella pizarrensis (1) | E | 75–100 (deep end) | |
| 195R-CC, 10–12 | 695.29 | Lenticulina, marginulinids, polymorph, Bulimina mexicana, Buliminella gracilis, agglutinants, A: Cibicidoides pachyderma, Pullenia bulloides, Rectuvigerina lamelata, Cibicidoides crebbsi, Oridorsalis, Melonis pompilioides | P–E | Abundant planktonics and benthics, especially in pan; diverse, dw assemblage | >100 |
| 198R-CC, 0–4 | 703.76 | Barren | ? | ||
| 201R-CC, 0–4 | 711.48 | Barren | ? | ||
| 203R-CC, 79–81 | 715.32 | Barren | ? | ||
| 205R-CC, 13–15 | 722.80 | Barren | ? | ||
| 208-CC, 14–16 | 730.65 | Barren | ? | ||
| 209R-1, 0–4 | 731.51 | Barren | ? | ||
| 210R-3, 25–27 | 737.81 | Barren | ? | ||
| 214R-1, 51–53 | 747.73 | Cibicidoides pachyderma, Oridorsalis, Hanzawaia mantaensis, Bolivina, Gyroidinoides, Uvigerina, Buliminella gracilis, Lenticulina, polymorph; Pan: quartz and glauconite with foraminifers | P–M; a few exc (Orid, Bol) | >100 | |
| 217R-1, 0–4 | 752.86 | A: Uvigerina juncea, C: Lenticulina, Bigenerina, Buliminella gracilis, Hanzawaia mantaensis, Bolivina, Cibicidoides pachyderma, Cibicidoides crebbsi; R: Fissurina, Plectofrondicularia; Pan: Buliminella, Bolivina, Stilostomella | P–VG | >100 shallower than 214 | |
| 217R-CC, 11–13 | 756.33 | Plectofrondicularia, polymorph, Uvigerina juncea, Buliminella gracilis; Pan: Buliminella gracilis, rare foraminifers | P–G | 75–100 | |
Notes: Abundance: A = abundant; C = common; Fr = frequent, R = rare; F = few, P = present. Polymorph = Guttulina austriaca, Guttulina candata, undifferentiated polymorphinids. Nonionella pizarrensis includes possible Nonionella grateloupi. Buliminella gracilis = Caucasina elongata? Gyroidinoides includes possible Gyroidinoides nipponica. Preservation: E = excellent; G = good; M = moderate; P = poor; VG = very good.
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