Alegret, Laia; Thomas, Ellen (2005): Relative abundances of benthic foraminifera at the Cretaceous/Paleogene boundary in DSDP Hole 62-465A, Southern Hess Rise in the central North Pacific (Appendix A) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.694032, Supplement to: Alegret, L; Thomas, E (2005): Cretaceous/Paleogene boundary bathyal paleo-environments in the central North Pacific (DSDP Site 465), the Northwestern Atlantic (ODP Site 1049), the Gulf of Mexico and the Tethys: The benthic foraminiferal record. Palaeogeography, Palaeoclimatology, Palaeoecology, 224(1-3), 53-82, https://doi.org/10.1016/j.palaeo.2005.03.031
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Abstract:
Uppermost Maastrichtian benthic foraminiferal assemblages (>63 µm) are diverse, indicating mesotrophic conditions in lower bathyal DSDP Hole 465A (Hess Rise, central North Pacific), in 4 lower bathyal land sections in central-East and Northeastern Mexico, and in the upper to middle bathyal Agost section (Tethys area, Southeastern Spain). They indicate more eutrophic conditions in lower bathyal ODP Hole 1049C (Blake Nose, Northwestern Atlantic). Benthic foraminifers did not suffer significant extinction at the K/Pg boundary, but diversity and heterogeneity of the assemblages and the percentage of infaunal morphogroups decreased drastically in all sections, with the exception of DSDP Hole 465A where the percentage of infaunal taxa increased. These faunal changes probably reflect the effect on the benthic faunas of a widespread decrease in the food supply to the sea floor, as a result of the collapse of primary productivity at the K/Pg boundary. The decrease in food supply apparently affected the benthic faunas least at more eutrophic NW Atlantic ODP Site 1049 and at Pacific DSDP Site 465, which is distal from the impact site of the K/Pg bolide on the Yucatan Peninsula. At these sites the faunas recovered within the Parvulorugoglobigerina eugubina Biozone (~100 ky), although diversity and heterogeneity remained low through the early Danian, possibly indicating environmental stress. This stress might be related to a high or fluctuating food supply by primary producers that could not easily be used by the benthos, such as various bloom species of dinoflagellates. Benthic assemblages recovered more slowly (~300 ky) in the Mexican and Spanish sections. Low oxygen conditions after the K/Pg boundary could be inferred from the benthic assemblages at Agost (Southeastern Spain) only. A short episode of hypoxia, however, may be obscured at Pacific DSDP Hole 465A by drilling disturbance, and in the Mexican sections and Hole 1049C by incomplete sections due to downslope transport. Benthic foraminiferal assemblages thus appear to have been affected by the collapse of primary productivity at the K/Pg boundary to a different extent in different regions, and took different lengths of time for their recovery after the boundary.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 33.820500 * Longitude: 178.919000
Date/Time Start: 1978-08-23T00:00:00 * Date/Time End: 1978-08-23T00:00:00
Minimum DEPTH, sediment/rock: 58.65 m * Maximum DEPTH, sediment/rock: 64.94 m
Event(s):
62-465A * Latitude: 33.820500 * Longitude: 178.919000 * Date/Time: 1978-08-23T00:00:00 * Elevation: -2161.0 m * Penetration: 476 m * Recovery: 98.9 m * Location: North Pacific/CONT RISE * Campaign: Leg62 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 408.5 m cored; 9.5 m drilled; 24.2 % 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 | Clavulinoides amorpha | C. amorpha | % | Alegret, Laia | Counting >63 µm fraction | |
4 | Clavulinoides trilatera | C. trilatera | % | Alegret, Laia | Counting >63 µm fraction | |
5 | Clavulinoides spp. | Clavulinoides spp. | % | Alegret, Laia | Counting >63 µm fraction | |
6 | Dorothia pupa | D. pupa | % | Alegret, Laia | Counting >63 µm fraction | |
7 | Dorothia spp. | Dorothia spp. | % | Alegret, Laia | Counting >63 µm fraction | |
8 | Gaudryina pyramidata | G. pyramidata | % | Alegret, Laia | Counting >63 µm fraction | |
9 | Gaudryina spp. | Gaudryina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
10 | Marssonella oxycona | M. oxycona | % | Alegret, Laia | Counting >63 µm fraction | |
11 | Marssonella spp. | Marssonella spp. | % | Alegret, Laia | Counting >63 µm fraction | |
12 | Spiroplectammina excolata | S. excolata | % | Alegret, Laia | Counting >63 µm fraction | |
13 | Spiroplectammina spp. | Spiroplectammina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
14 | Spiroplectammina spectabilis | S. spectabilis | % | Alegret, Laia | Counting >63 µm fraction | |
15 | Vulvulina sp. | Vulvulina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
16 | Alabamina wilcoxensis | A. wilcoxensis | % | Alegret, Laia | Counting >63 µm fraction | |
17 | Anomalinoides acuta | A. acuta | % | Alegret, Laia | Counting >63 µm fraction | |
18 | Anomalinoides affinis | A. affinis | % | Alegret, Laia | Counting >63 µm fraction | |
19 | Anomalinoides ammonoides | A. ammonoides | % | Alegret, Laia | Counting >63 µm fraction | |
20 | Anomalinoides spp. | Anomalinoides spp. | % | Alegret, Laia | Counting >63 µm fraction | |
21 | Aragonia sp. | Aragonia sp. | % | Alegret, Laia | Counting >63 µm fraction | |
22 | Aragonia velascoensis | A. velascoensis | % | Alegret, Laia | Counting >63 µm fraction | |
23 | Bolivinoides decoratus | B. decoratus | % | Alegret, Laia | Counting >63 µm fraction | |
24 | Bolivinoides delicatulus | B. delicatulus | % | Alegret, Laia | Counting >63 µm fraction | |
25 | Bulimina spp. | Bulimina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
26 | Bulimina midwayensis | B. midwayensis | % | Alegret, Laia | Counting >63 µm fraction | |
27 | Bulimina ovula | B. ovula | % | Alegret, Laia | Counting >63 µm fraction | |
28 | Bulimina trinitatensis | B. trinitatensis | % | Alegret, Laia | Counting >63 µm fraction | |
29 | Bulimina velascoensis | B. velascoensis | % | Alegret, Laia | Counting >63 µm fraction | |
30 | Buliminella beaumonti | B. beaumonti | % | Alegret, Laia | Counting >63 µm fraction | |
31 | Buliminella spp. | Buliminella spp. | % | Alegret, Laia | Counting >63 µm fraction | |
32 | Cibicidoides hyphalus | C. hyphalus | % | Alegret, Laia | Counting >63 µm fraction | |
33 | Cibicidoides velascoensis | C. velascoensis | % | Alegret, Laia | Counting >63 µm fraction | |
34 | Cibicidoides howelli | C. howelli | % | Alegret, Laia | Counting >63 µm fraction | |
35 | Cibicidoides spp. | Cibicidoides spp. | % | Alegret, Laia | Counting >63 µm fraction | |
36 | Coryphostoma sp. | Coryphostoma sp. | % | Alegret, Laia | Counting >63 µm fraction | |
37 | Ellipsodimorphina spp. | Ellipsodimorphina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
38 | Eouvigerina subsculptura | E. subsculptura | % | Alegret, Laia | Counting >63 µm fraction | |
39 | Eouvigerina spp. | Eouvigerina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
40 | Euuvigerina elongata | E. elongata | % | Alegret, Laia | Counting >63 µm fraction | |
41 | Fissurina spp. | Fissurina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
42 | Frondicularia sp. | Frondicularia sp. | % | Alegret, Laia | Counting >63 µm fraction | |
43 | Fursenkoina tegulata | F. tegulata | % | Alegret, Laia | Counting >63 µm fraction | |
44 | Glandulina spp. | Glandulina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
45 | Globulina prisca | G. prisca | % | Alegret, Laia | Counting >63 µm fraction | |
46 | Globulina spp. | Globulina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
47 | Guttulina sp. | Guttulina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
48 | Globorotalites sp. | Globorotalites sp. | % | Alegret, Laia | Counting >63 µm fraction | |
49 | Gyroidinoides beisseli | G. beisseli | % | Alegret, Laia | Counting >63 µm fraction | |
50 | Gyroidinoides depressus | G. depressus | % | Alegret, Laia | Counting >63 µm fraction | |
51 | Gyroidinoides globosus | G. globosus | % | Alegret, Laia | Counting >63 µm fraction | |
52 | Gyroidinoides gyrardanus | G. gyrardanus | % | Alegret, Laia | Counting >63 µm fraction | |
53 | Gyroidinoides spp. | Gyroidinoides spp. | % | Alegret, Laia | Counting >63 µm fraction | |
54 | Heronallenia lingulata | H. lingulata | % | Alegret, Laia | Counting >63 µm fraction | |
55 | Laevidentalinidae | Laevidentalinidae | % | Alegret, Laia | Counting >63 µm fraction | Laevidentalinids |
56 | Lagena spp. | Lagena spp. | % | Alegret, Laia | Counting >63 µm fraction | |
57 | Lenticulina spp. | Lenticulina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
58 | Marginulina sp. | Marginulina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
59 | Neoflabellina sp. | Neoflabellina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
60 | Nuttallides spp. | Nuttallides spp. | % | Alegret, Laia | Counting >63 µm fraction | |
61 | Nuttallides truempyi | N. truempyi | % | Alegret, Laia | Counting >63 µm fraction | |
62 | Nuttallinella florealis | N. florealis | % | Alegret, Laia | Counting >63 µm fraction | |
63 | Nuttallinella spp. | Nuttallinella spp. | % | Alegret, Laia | Counting >63 µm fraction | |
64 | Oridorsalis plummerae | O. plummerae | % | Alegret, Laia | Counting >63 µm fraction | |
65 | Oridorsalis umbonatus | O. umbonatus | % | Alegret, Laia | Counting >63 µm fraction | |
66 | Oridorsalis spp. | Oridorsalis spp. | % | Alegret, Laia | Counting >63 µm fraction | |
67 | Osangularia cordieriana | O. cordieriana | % | Alegret, Laia | Counting >63 µm fraction | |
68 | Osangularia velascoensis | O. velascoensis | % | Alegret, Laia | Counting >63 µm fraction | |
69 | Osangularia spp. | Osangularia spp. | % | Alegret, Laia | Counting >63 µm fraction | |
70 | Paliolatella sp. | Paliolatella sp. | % | Alegret, Laia | Counting >63 µm fraction | |
71 | Paralabamina hillebrandti | P. hillebrandti | % | Alegret, Laia | Counting >63 µm fraction | |
72 | Paralabamina lunata | P. lunata | % | Alegret, Laia | Counting >63 µm fraction | |
73 | Paralabamina sp. | Paralabamina sp. | % | Alegret, Laia | Counting >63 µm fraction | thick |
74 | Pleurostomella spp. | Pleurostomella spp. | % | Alegret, Laia | Counting >63 µm fraction | |
75 | Praebulimina reussi | P. reussi | % | Alegret, Laia | Counting >63 µm fraction | |
76 | Praebulimina spp. | Praebulimina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
77 | Pseudopolimorphina cuyleri | P. cuyleri | % | Alegret, Laia | Counting >63 µm fraction | |
78 | Pseudopolimorphina sp. | Pseudopolimorphina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
79 | Pullenia jarvisi | P. jarvisi | % | Alegret, Laia | Counting >63 µm fraction | |
80 | Pyramidina rudita | P. rudita | % | Alegret, Laia | Counting >63 µm fraction | |
81 | Pyramidina sp. | Pyramidina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
82 | Pyrulinoides sp. | Pyrulinoides sp. | % | Alegret, Laia | Counting >63 µm fraction | |
83 | Quadratobuliminella pyramidalis | Q. pyramidalis | % | Alegret, Laia | Counting >63 µm fraction | |
84 | Quadrimorphina allomorphinoides | Q. allomorphinoides | % | Alegret, Laia | Counting >63 µm fraction | |
85 | Quadrimorphina sp. | Quadrimorphina sp. | % | Alegret, Laia | Counting >63 µm fraction | flat |
86 | Quinqueloculina sp. | Quinqueloculina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
87 | Reussella szajnochae | R. szajnochae | % | Alegret, Laia | Counting >63 µm fraction | |
88 | Scheibnerova sp. | Scheibnerova sp. | % | Alegret, Laia | Counting >63 µm fraction | |
89 | Stilostomella subspinosa | S. subspinosa | % | Alegret, Laia | Counting >63 µm fraction | |
90 | Stensioeina beccariiformis | S. beccariiformis | % | Alegret, Laia | Counting >63 µm fraction | |
91 | Valvalabamina lenticula | V. lenticula | % | Alegret, Laia | Counting >63 µm fraction |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
1350 data points