Alegret, Laia; Thomas, Ellen (2004): Benthic foraminiferal abundances at the Cretaceous/Paleogene boundary of ODP Hole 117-1049C at Blake Nose, Northwest Atlantic (Appendix A) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.695112, Supplement to: Alegret, L; Thomas, E (2004): Benthic foraminifera and environmental turnover across the Cretaceous/Paleogene boundary at Blake Nose (ODP Hole 1049C, Northwestern Atlantic). Palaeogeography, Palaeoclimatology, Palaeoecology, 208(1-2), 59-83, https://doi.org/10.1016/j.palaeo.2004.02.028
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Abstract:
Sediments recovered at lower bathyal ODP Site 1049 on Blake Nose (Northwestern Atlantic) offer an opportunity to study environmental changes at the Cretaceous/Paleogene (K/P) boundary relatively close to the Chicxulub impact structure on the Yucatan peninsula, Mexico. In Hole 1049C, the boundary is located at the base of a 9-cm-thick layer with abundant spherules, considered to be impact ejecta. Uppermost Maastrichtian oozes below, and lowermost Danian pelagic oozes above the spherulebed contain well-preserved bathyal benthic foraminifera. The spherule-bed itself, in contrast, contains a mixture of shallow (neritic) and deeper (bathyal) species, and specimens vary strongly in preservation. This assemblage was probably formed by reworking and down-slope transport triggered by the K/P impact. Across the spherule-bed (i.e., the K/P boundary) only ~7% of benthic foraminiferal species became extinct, similar to the low extinction rates of benthic foraminifera worldwide. Quantitative analysis of benthic foraminiferal assemblages and morphogroups in the >63-µm size fraction indicates a relatively eutrophic, stable environment during the latest Maastrichtian, interrupted by a sudden decrease in the food supply to the benthos at the K/P boundary and a decrease in diversity of the faunas, followed by a stepped recovery during the earliest Danian. The recovery was probably linked to the gradual recovery of surface-dwelling primary producers.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 30.142270 * Longitude: -76.112110
Date/Time Start: 1997-01-16T00:30:00 * Date/Time End: 1997-01-16T00:30:00
Minimum DEPTH, sediment/rock: 106.2100 m * Maximum DEPTH, sediment/rock: 113.5900 m
Event(s):
171-1049C * Latitude: 30.142270 * Longitude: -76.112110 * Date/Time: 1997-01-16T00:30:00 * Elevation: -2670.8 m * Penetration: 158.5 m * Recovery: 88.86 m * Location: Blake Nose, North Atlantic Ocean * Campaign: Leg171B * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 111.5 m cored; 47 m drilled; 79.7 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Sample code/label | Sample label | Alegret, Laia | DSDP/ODP/IODP sample designation | ||
| 3 | Alabamina midwayensis | A. midwayensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 4 | Alabamina spp. | Alabamina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 5 | Alabamina wilcoxensis | A. wilcoxensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 6 | Allomorphina sp. | Allomorphina sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 7 | Allomorphina velascoensis | A. velascoensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 8 | Ammodiscus sp. | Ammodiscus sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 9 | Anomalinoides acuta | A. acuta | # | Alegret, Laia | Counting >63 µm fraction | |
| 10 | Anomalinoides affinis | A. affinis | # | Alegret, Laia | Counting >63 µm fraction | |
| 11 | Anomalinoides ammonoides | A. ammonoides | # | Alegret, Laia | Counting >63 µm fraction | |
| 12 | Anomalinoides rubiginosus | A. rubiginosus | # | Alegret, Laia | Counting >63 µm fraction | |
| 13 | Anomalinoides spp. | Anomalinoides spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 14 | Aragonia velascoensis | A. velascoensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 15 | Arenobulimina truncata | A. truncata | # | Alegret, Laia | Counting >63 µm fraction | |
| 16 | Astacolus spp. | Astacolus spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 17 | Bifarina spp. | Bifarina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 18 | Bolivinoides delicatulus | B. delicatulus | # | Alegret, Laia | Counting >63 µm fraction | |
| 19 | Bolivinoides draco | B. draco | # | Alegret, Laia | Counting >63 µm fraction | |
| 20 | Bulimina paleocenica | B. paleocenica | # | Alegret, Laia | Counting >63 µm fraction | Bulimina (Reussella) paleocenica |
| 21 | Bulimina kugleri | B. kugleri | # | Alegret, Laia | Counting >63 µm fraction | |
| 22 | Bulimina midwayensis | B. midwayensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 23 | Bulimina spp. | Bulimina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 24 | Bulimina thanetensis | B. thanetensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 25 | Bulimina trinitatensis | B. trinitatensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 26 | Bulimina velascoensis | B. velascoensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 27 | Buliminella beaumonti | B. beaumonti | # | Alegret, Laia | Counting >63 µm fraction | |
| 28 | Buliminella grata | B. grata | # | Alegret, Laia | Counting >63 µm fraction | |
| 29 | Buliminella sp. | Buliminella sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 30 | Cibicidoides dayi | C. dayi | # | Alegret, Laia | Counting >63 µm fraction | |
| 31 | Cibicidoides ekblomi | C. ekblomi | # | Alegret, Laia | Counting >63 µm fraction | |
| 32 | Cibicidoides hyphalus | C. hyphalus | # | Alegret, Laia | Counting >63 µm fraction | |
| 33 | Cibicidoides proprius | C. proprius | # | Alegret, Laia | Counting >63 µm fraction | |
| 34 | Cibicidoides spp. | Cibicidoides spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 35 | Cibicidoides velascoensis | C. velascoensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 36 | Cibicidoides welleri | C. welleri | # | Alegret, Laia | Counting >63 µm fraction | |
| 37 | Clavulinoides amorpha | C. amorpha | # | Alegret, Laia | Counting >63 µm fraction | |
| 38 | Clavulinoides amorpha | C. amorpha | # | Alegret, Laia | Counting >63 µm fraction | juvenile form |
| 39 | Clavulinoides spp. | Clavulinoides spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 40 | Clavulinoides trilatera | C. trilatera | # | Alegret, Laia | Counting >63 µm fraction | |
| 41 | Clavulinoides trilatera | C. trilatera | # | Alegret, Laia | Counting >63 µm fraction | juvenile form |
| 42 | Coryphostoma decurrens | C. decurrens | # | Alegret, Laia | Counting >63 µm fraction | |
| 43 | Coryphostoma incrassata | C. incrassata | # | Alegret, Laia | Counting >63 µm fraction | |
| 44 | Coryphostoma spp. | Coryphostoma spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 45 | Coryphostomella sp. | Coryphostomella sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 46 | Dorothia bulletta | D. bulletta | # | Alegret, Laia | Counting >63 µm fraction | |
| 47 | Dorothia spp. | Dorothia spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 48 | Ellipsodimorphina spp. | Ellipsodimorphina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 49 | Eouvigerina sp. | Eouvigerina sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 50 | Eouvigerina subsculptura | E. subsculptura | # | Alegret, Laia | Counting >63 µm fraction | |
| 51 | Fissurina spp. | Fissurina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 52 | Frondicularia sp. | Frondicularia sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 53 | Fursenkoina tegulata | F. tegulata | # | Alegret, Laia | Counting >63 µm fraction | |
| 54 | Gaudryina laevigata | G. laevigata | # | Alegret, Laia | Counting >63 µm fraction | |
| 55 | Gaudryina pyramidata | G. pyramidata | # | Alegret, Laia | Counting >63 µm fraction | |
| 56 | Gaudryina spp. | Gaudryina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 57 | Glandulina sp. | Glandulina sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 58 | Globorotalites sp. | Globorotalites sp. | # | Alegret, Laia | Counting >63 µm fraction | var. A |
| 59 | Globorotalites spp. | Globorotalites spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 60 | Globulina prisca | G. prisca | # | Alegret, Laia | Counting >63 µm fraction | |
| 61 | Globulina spp. | Globulina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 62 | Glomospirella grzybowskii | G. grzybowskii | # | Alegret, Laia | Counting >63 µm fraction | |
| 63 | Guttulina sp. | Guttulina sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 64 | Gyroidinoides acutus | G. acutus | # | Alegret, Laia | Counting >63 µm fraction | |
| 65 | Gyroidinoides beisseli | G. beisseli | # | Alegret, Laia | Counting >63 µm fraction | |
| 66 | Gyroidinoides depressus | G. depressus | # | Alegret, Laia | Counting >63 µm fraction | |
| 67 | Gyroidinoides girardana | G. girardana | # | Alegret, Laia | Counting >63 µm fraction | |
| 68 | Gyroidinoides globosus | G. globosus | # | Alegret, Laia | Counting >63 µm fraction | |
| 69 | Gyroidinoides soldanii | G. soldanii | # | Alegret, Laia | Counting >63 µm fraction | |
| 70 | Gyroidinoides sp. | Gyroidinoides sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 71 | Haplophragmoides sp. | Haplophragmoides sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 72 | Heronallenia lingulata | H. lingulata | # | Alegret, Laia | Counting >63 µm fraction | |
| 73 | Lagena spp. | Lagena spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 74 | Lenticulina rotulata | L. rotulata | # | Alegret, Laia | Counting >63 µm fraction | |
| 75 | Lenticulina spp. | Lenticulina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 76 | Lingulina sp. | Lingulina sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 77 | Marssonella oxycona | M. oxycona | # | Alegret, Laia | Counting >63 µm fraction | |
| 78 | Marssonella oxycona | M. oxycona | # | Alegret, Laia | Counting >63 µm fraction | juvenile form |
| 79 | Marssonella spp. | Marssonella spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 80 | Neocorbina sp. | Neocorbina sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 81 | Neoflabellina sp. | Neoflabellina sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 82 | Nonion havanense | N. havanense | # | Alegret, Laia | Counting >63 µm fraction | |
| 83 | Nonionella cretacea | N. cretacea | # | Alegret, Laia | Counting >63 µm fraction | |
| 84 | Nonionella robusta | N. robusta | # | Alegret, Laia | Counting >63 µm fraction | |
| 85 | Nonionella sp. | Nonionella sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 86 | Nuttallides spp. | Nuttallides spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 87 | Nuttallides truempyi | N. truempyi | # | Alegret, Laia | Counting >63 µm fraction | |
| 88 | Nuttallinella coronula | N. coronula | # | Alegret, Laia | Counting >63 µm fraction | |
| 89 | Nuttallinella florealis | N. florealis | # | Alegret, Laia | Counting >63 µm fraction | |
| 90 | Nuttallinella spp. | Nuttallinella spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 91 | Oolina spp. | Oolina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 92 | Oridorsalis plummerae | O. plummerae | # | Alegret, Laia | Counting >63 µm fraction | |
| 93 | Oridorsalis sp. | Oridorsalis sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 94 | Oridorsalis umbonatus | O. umbonatus | # | Alegret, Laia | Counting >63 µm fraction | |
| 95 | Osangularia velascoensis | O. velascoensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 96 | Osangularia spp. | Osangularia spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 97 | Palliolatella sp. | Palliolatella sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 98 | Paralabamina cf. hillebrandti | P. cf. hillebrandti | # | Alegret, Laia | Counting >63 µm fraction | |
| 99 | Paralabamina hillebrandti | P. hillebrandti | # | Alegret, Laia | Counting >63 µm fraction | |
| 100 | Paralabamina lunata | P. lunata | # | Alegret, Laia | Counting >63 µm fraction | |
| 101 | Paralabamina spp. | Paralabamina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 102 | Pleurostomella sp. | Pleurostomella sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 103 | Pleurostomella aff. subnodosa | P. aff. subnodosa | # | Alegret, Laia | Counting >63 µm fraction | |
| 104 | Polymorphinella sp. | Polymorphinella sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 105 | Praebulimina reussi | P. reussi | # | Alegret, Laia | Counting >63 µm fraction | |
| 106 | Praebulimina sp. | Praebulimina sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 107 | Pseudouvigerina plummerae | P. plummerae | # | Alegret, Laia | Counting >63 µm fraction | |
| 108 | Pullenia cretacea | P. cretacea | # | Alegret, Laia | Counting >63 µm fraction | |
| 109 | Pullenia jarvisi | P. jarvisi | # | Alegret, Laia | Counting >63 µm fraction | |
| 110 | Pyramidina rudita | P. rudita | # | Alegret, Laia | Counting >63 µm fraction | |
| 111 | Pyramidina sp. | Pyramidina sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 112 | Pyrulina spp. | Pyrulina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 113 | Pyrulinoides sp. | Pyrulinoides sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 114 | Quadrimorphina allomorphinoides | Q. allomorphinoides | # | Alegret, Laia | Counting >63 µm fraction | |
| 115 | Quadrimorphina spp. | Quadrimorphina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 116 | Quinqueloculina sp. | Quinqueloculina sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 117 | Ramulina spp. | Ramulina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 118 | Reophax spp. | Reophax spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 119 | Reussella szajnochae | R. szajnochae | # | Alegret, Laia | Counting >63 µm fraction | |
| 120 | Rhizammina spp. | Rhizammina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 121 | Scheibnerova sp. | Scheibnerova sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 122 | Seabrookia cretacea | S. cretacea | # | Alegret, Laia | Counting >63 µm fraction | |
| 123 | Siphogenerinoides sp. | Siphogerenoides sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 124 | Sitella sp. | Sitella sp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 125 | Sliteria varsoviensis | S. varsoviensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 126 | Spiroplectammina dentata | S. dentata | # | Alegret, Laia | Counting >63 µm fraction | |
| 127 | Spiroplectammina spectabilis | S. spectabilis | # | Alegret, Laia | Counting >63 µm fraction | |
| 128 | Spiroplectammina spp. | Spiroplectammina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 129 | Stensioeina beccariiformis | S. beccariiformis | # | Alegret, Laia | Counting >63 µm fraction | |
| 130 | Stensioeina excolata | S. excolata | # | Alegret, Laia | Counting >63 µm fraction | |
| 131 | Stilostomella spp. | Stilostomella spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 132 | Stilostomella subspinosa | S. subspinosa | # | Alegret, Laia | Counting >63 µm fraction | |
| 133 | Tappanina selmensis | T. selmensis | # | Alegret, Laia | Counting >63 µm fraction | |
| 134 | Tappanina spp. | Tappanina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 135 | Uvigerina spp. | Uvigerina spp. | # | Alegret, Laia | Counting >63 µm fraction | |
| 136 | Vaginulina trilobata | V. trilobata | # | Alegret, Laia | Counting >63 µm fraction | |
| 137 | Valvalabamina lenticula | V. lenticula | # | Alegret, Laia | Counting >63 µm fraction |
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