Alegret, Laia; Thomas, Ellen (2007): Benthic foraminiferal assemblages across the Cretaceous Paleogene boundray of ODP Site 208-1262 on Walvis Ridge, eastern South Atlantic [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.672083, Supplement to: Alegret, L; Thomas, E (2007): Deep-Sea environments across the Cretaceous/Paleogene boundary in the eastern South Atlantic Ocean (ODP Leg 208, Walvis Ridge). Marine Micropaleontology, 64(3-4), 1-17, https://doi.org/10.1016/j.marmicro.2006.12.003
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Abstract:
Sediments recovered at ODP Site 1262 on Walvis Ridge (eastern South Atlantic Ocean, paleodepth ~2500–3000 m) offer an opportunity to look into the nature and cause(s) of the benthic foraminiferal turnover across the Cretaceous/Paleogene (K/Pg) boundary at abyssal depths at a location relatively remote from the location of the asteroid impact on the Yucatan peninsula. Late Maastrichtian assemblages were diverse and heterogeneous, reflecting oligo- to mesotrophic conditions at the sea floor. As at other locations, there was no significant extinction of benthic foraminiferal species at the K/Pg boundary, but the diversity and heterogeneity of the assemblages decreased precipitously. The percentage of infaunal buliminid taxa decreased rapidly, but the total percentage of infaunal taxa remained essentially unchanged. Benthic foraminiferal accumulation rates (BFAR) dropped at the boundary itself, and fluctuated strongly later in the Danian. After the K/Pg boundary, opportunistic taxa increased in relative abundance, and diversity and heterogeneity strongly fluctuated. There thus is no clear agreement between three proxies which have been used to indicate a high food supply to the sea floor: percentage buliminids, percentage infaunal taxa, and BFAR. This discrepancy might indicate that the food supply changed in character (e.g., type of food, temporal variability in flux), but did not show a long-term, large net change in total amount. The strong fluctuations in BFAR, heterogeneity and diversity indicate that environmental instability started at the K/Pg boundary, and persisted through planktic foraminiferal zones P* and P1a. In lower planktic foraminiferal zone P1b, agglutinated species of the genera Spiroplectammina and Clavulinoides, thought to be infaunal and indicative of increasing levels of food supply, increased in relative abundance while the relative abundance of buliminids remained low. Possibly, agglutinated taxa took over at least part of the infaunal niche in the Paleocene, as a result of the rise in the calcium carbonate compensation depth. Towards the upper part of the studied interval (lower planktic foraminiferal Subzone 1c), benthic foraminiferal assemblages stabilized, with heterogeneity almost back to Maastrichtian values, although diversity and BFAR did not fully recover.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -27.185833 * Longitude: 1.577000
Date/Time Start: 2003-03-24T00:00:00 * Date/Time End: 2003-03-29T00:00:00
Minimum DEPTH, sediment/rock: 210.30 m * Maximum DEPTH, sediment/rock: 221.50 m
Event(s):
208-1262 * Latitude: -27.185833 * Longitude: 1.577000 * Date/Time Start: 2003-03-24T00:00:00 * Date/Time End: 2003-03-29T00:00:00 * Elevation: -4755.4 m * Penetration: 583.9 m * Recovery: 502.5 m * Location: Walvis Ridge, Southeast Atlantic Ocean * Campaign: Leg208 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 54 cores; 493.9 m cored; 90 m drilled; 101.7 % recovery
Comment:
Sediment depth are meters composite depth (mcd) following Zachos et al. (2004)
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 | Ammodiscus sp. | Ammodiscus sp. | % | Alegret, Laia | Counting >63 µm fraction | |
4 | Arenobulimina truncata | A. truncata | % | Alegret, Laia | Counting >63 µm fraction | |
5 | Caudammina ovula | C. ovula | % | Alegret, Laia | Counting >63 µm fraction | |
6 | Clavulinoides amorpha | C. amorpha | % | Alegret, Laia | Counting >63 µm fraction | |
7 | Clavulinoides sp. | Clavulinoides sp. | % | Alegret, Laia | Counting >63 µm fraction | juvenile form |
8 | Clavulinoides sp. | Clavulinoides sp. | % | Alegret, Laia | Counting >63 µm fraction | |
9 | Dorothia bulletta | D. bulletta | % | Alegret, Laia | Counting >63 µm fraction | |
10 | Dorothia trochoides | D. trochoides | % | Alegret, Laia | Counting >63 µm fraction | |
11 | Dorothia spp. | Dorothia spp. | % | Alegret, Laia | Counting >63 µm fraction | |
12 | Gaudryina pyramidata | G. pyramidata | % | Alegret, Laia | Counting >63 µm fraction | |
13 | Gaudryina spp. | Gaudryina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
14 | Glomospira sp. | Glomospira sp. | % | Alegret, Laia | Counting >63 µm fraction | |
15 | Glomospirella grzybowskii | G. grzybowskii | % | Alegret, Laia | Counting >63 µm fraction | |
16 | Repmanina charoides | R. charoides | % | Alegret, Laia | Counting >63 µm fraction | |
17 | Hyperammina sp. | Hyperammina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
18 | Marssonella oxycona | M. oxycona | % | Alegret, Laia | Counting >63 µm fraction | |
19 | Marssonella sp. | Marssonella sp. | % | Alegret, Laia | Counting >63 µm fraction | juvenile form |
20 | Marssonella indentata | M. indentata | % | Alegret, Laia | Counting >63 µm fraction | |
21 | Paratrochamminoides sp. | Paratrochamminoides sp. | % | Alegret, Laia | Counting >63 µm fraction | |
22 | Recurvoides sp. | Recurvoides sp. | % | Alegret, Laia | Counting >63 µm fraction | |
23 | Reophax sp. | Reophax sp. | % | Alegret, Laia | Counting >63 µm fraction | |
24 | Rhizammina sp. | Rhizammina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
25 | Rzehakina sp. | Rzehakina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
26 | Saccammina sp. | Saccammina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
27 | Spirillina sp. | Spirillina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
28 | Spiroplectammina cf. dentata | S. cf. dentata | % | Alegret, Laia | Counting >63 µm fraction | |
29 | Spiroplectammina cf. laevis | S. cf. laevis | % | Alegret, Laia | Counting >63 µm fraction | |
30 | Spiroplectammina spp. | Spiroplectammina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
31 | Spiroplectammina cf. israelskyi | S. cf. israelskyi | % | Alegret, Laia | Counting >63 µm fraction | |
32 | Spiroplectammina spectabilis | S. spectabilis | % | Alegret, Laia | Counting >63 µm fraction | |
33 | Trochamminoides sp. | Trochamminoides sp. | % | Alegret, Laia | Counting >63 µm fraction | |
34 | Vulvulina sp. | Vulvulina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
35 | Alabamina creta | A. creta | % | Alegret, Laia | Counting >63 µm fraction | |
36 | Alabamina sp. | Alabamina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
37 | Allomorphina velascoensis | A. velascoensis | % | Alegret, Laia | Counting >63 µm fraction | |
38 | Angulogavelinella avnimelechi | A. avnimelechi | % | Alegret, Laia | Counting >63 µm fraction | |
39 | Anomalinoides affinis | A. affinis | % | Alegret, Laia | Counting >63 µm fraction | |
40 | Anomalinoides ammonoides | A. ammonoides | % | Alegret, Laia | Counting >63 µm fraction | |
41 | Anomalinoides sp. | Anomalinoides sp. | % | Alegret, Laia | Counting >63 µm fraction | var. A |
42 | Anomalinoides sp. | Anomalinoides sp. | % | Alegret, Laia | Counting >63 µm fraction | var. B |
43 | Anomalinoides spp. | Anomalinoides spp. | % | Alegret, Laia | Counting >63 µm fraction | |
44 | Aragonia velascoensis | A. velascoensis | % | Alegret, Laia | Counting >63 µm fraction | |
45 | Astacolus spp. | Astacolus spp. | % | Alegret, Laia | Counting >63 µm fraction | |
46 | Bolivina cf. huneri | B. cf. huneri | % | Alegret, Laia | Counting >63 µm fraction | |
47 | Bolivinoides decoratus | B. decoratus | % | Alegret, Laia | Counting >63 µm fraction | |
48 | Bolivinoides delicatulus | B. delicatulus | % | Alegret, Laia | Counting >63 µm fraction | |
49 | Buchnerina sp. | Buchnerina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
50 | Bulimina spp. | Bulimina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
51 | Bulimina cf. alazanensis | B. cf. alazanensis | % | Alegret, Laia | Counting >63 µm fraction | |
52 | Bulimina midwayensis | B. midwayensis | % | Alegret, Laia | Counting >63 µm fraction | |
53 | Bulimina kugleri | B. kugleri | % | Alegret, Laia | Counting >63 µm fraction | |
54 | Bulimina paleocenica | B. paleocenica | % | Alegret, Laia | Counting >63 µm fraction | |
55 | Bulimina trinitatensis | B. trinitatensis | % | Alegret, Laia | Counting >63 µm fraction | |
56 | Bulimina velascoensis | B. velascoensis | % | Alegret, Laia | Counting >63 µm fraction | |
57 | Buliminella beaumonti | B. beaumonti | % | Alegret, Laia | Counting >63 µm fraction | |
58 | Buliminella sp. | Buliminella sp. | % | Alegret, Laia | Counting >63 µm fraction | |
59 | Cibicidoides cf. dayi | C. cf. dayi | % | Alegret, Laia | Counting >63 µm fraction | |
60 | Cibicidoides howelli | C. howelli | % | Alegret, Laia | Counting >63 µm fraction | |
61 | Cibicidoides hyphalus | C. hyphalus | % | Alegret, Laia | Counting >63 µm fraction | |
62 | Cibicidoides cf. naranjoensis | C. cf. naranjoensis | % | Alegret, Laia | Counting >63 µm fraction | |
63 | Cibicidoides velascoensis | C. velascoensis | % | Alegret, Laia | Counting >63 µm fraction | |
64 | Cibicidoides pseudoacutus | C. pseudoacutus | % | Alegret, Laia | Counting >63 µm fraction | |
65 | Cibicidoides sp. | Cibicidoides sp. | % | Alegret, Laia | Counting >63 µm fraction | |
66 | Coryphostoma spp. | Coryphostoma spp. | % | Alegret, Laia | Counting >63 µm fraction | |
67 | Ellipsodimorphina spp. | Ellipsodimorphina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
68 | Eouvigerina sp. | Eouvigerina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
69 | Fissurina spp. | Fissurina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
70 | Frondicularia sp. | Frondicularia sp. | % | Alegret, Laia | Counting >63 µm fraction | |
71 | Fursenkoina tegulata | F. tegulata | % | Alegret, Laia | Counting >63 µm fraction | |
72 | Fursenkoina sp. | Fursenkoina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
73 | Glandulina sp. | Glandulina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
74 | Globobulimina sp. | Globobulimina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
75 | Globulina prisca | G. prisca | % | Alegret, Laia | Counting >63 µm fraction | |
76 | Globulina spp. | Globulina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
77 | Guttulina sp. | Guttulina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
78 | Globorotalites sp. | Globorotalites sp. | % | Alegret, Laia | Counting >63 µm fraction | |
79 | Gyroidinoides beisseli | G. beisseli | % | Alegret, Laia | Counting >63 µm fraction | |
80 | Gyroidinoides depressus | G. depressus | % | Alegret, Laia | Counting >63 µm fraction | |
81 | Gyroidinoides globosus | G. globosus | % | Alegret, Laia | Counting >63 µm fraction | |
82 | Gyroidinoides girardana | G. girardana | % | Alegret, Laia | Counting >63 µm fraction | |
83 | Gyroidinoides quadratus | G. quadratus | % | Alegret, Laia | Counting >63 µm fraction | |
84 | Gyroidinoides sp. | Gyroidinoides sp. | % | Alegret, Laia | Counting >63 µm fraction | |
85 | Hemirobulina sp. | Hemirobulina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
86 | Heronallenia lingulata | H. lingulata | % | Alegret, Laia | Counting >63 µm fraction | |
87 | Laevidentalina spp. | Laevidentalina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
88 | Lagena spp. | Lagena spp. | % | Alegret, Laia | Counting >63 µm fraction | |
89 | Lenticulina spp. | Lenticulina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
90 | Lenticulina velascoensis | L. velascoensis | % | Alegret, Laia | Counting >63 µm fraction | |
91 | Lingulina sp. | Lingulina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
92 | Neoflabellina sp. | Neoflabellina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
93 | Nonionella cretacea | N. cretacea | % | Alegret, Laia | Counting >63 µm fraction | |
94 | Nonionella sp. | Nonionella sp. | % | Alegret, Laia | Counting >63 µm fraction | |
95 | Nuttallides spp. | Nuttallides spp. | % | Alegret, Laia | Counting >63 µm fraction | |
96 | Nuttallides truempyi | N. truempyi | % | Alegret, Laia | Counting >63 µm fraction | |
97 | Nuttallinella florealis | N. florealis | % | Alegret, Laia | Counting >63 µm fraction | |
98 | Nuttallinella spp. | Nuttallinella spp. | % | Alegret, Laia | Counting >63 µm fraction | |
99 | Oolina spp. | Oolina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
100 | Oridorsalis plummerae | O. plummerae | % | Alegret, Laia | Counting >63 µm fraction | |
101 | Oridorsalis umbonatus | O. umbonatus | % | Alegret, Laia | Counting >63 µm fraction | |
102 | Osangularia cordieriana | O. cordieriana | % | Alegret, Laia | Counting >63 µm fraction | |
103 | Osangularia velascoensis | O. velascoensis | % | Alegret, Laia | Counting >63 µm fraction | |
104 | Osangularia spp. | Osangularia spp. | % | Alegret, Laia | Counting >63 µm fraction | |
105 | Paliolatella sp. | Paliolatella sp. | % | Alegret, Laia | Counting >63 µm fraction | |
106 | Paralabamina hillebrandti | P. hillebrandti | % | Alegret, Laia | Counting >63 µm fraction | |
107 | Paralabamina cf. hillebrandti | P. cf. hillebrandti | % | Alegret, Laia | Counting >63 µm fraction | |
108 | Paralabamina lunata | P. lunata | % | Alegret, Laia | Counting >63 µm fraction | |
109 | Pleurostomella sp. | Pleurostomella sp. | % | Alegret, Laia | Counting >63 µm fraction | |
110 | Polymorphinella sp. | Polymorphinella sp. | % | Alegret, Laia | Counting >63 µm fraction | |
111 | Praebulimina reussi | P. reussi | % | Alegret, Laia | Counting >63 µm fraction | |
112 | Praebulimina sp. | Praebulimina sp. | % | Alegret, Laia | Counting >63 µm fraction | |
113 | Pullenia coryelli | P. coryelli | % | Alegret, Laia | Counting >63 µm fraction | |
114 | Pullenia cretacea | P. cretacea | % | Alegret, Laia | Counting >63 µm fraction | |
115 | Pullenia jarvisi | P. jarvisi | % | Alegret, Laia | Counting >63 µm fraction | |
116 | Pyramidina rudita | P. rudita | % | Alegret, Laia | Counting >63 µm fraction | |
117 | Pyrulina spp. | Pyrulina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
118 | Pyrulinoides sp. | Pyrulinoides sp. | % | Alegret, Laia | Counting >63 µm fraction | |
119 | Quadratobuliminella pyramidalis | Q. pyramidalis | % | Alegret, Laia | Counting >63 µm fraction | |
120 | Quadratobuliminella sp. | Quadratobuliminella sp. | % | Alegret, Laia | Counting >63 µm fraction | |
121 | Quadrimorphina allomorphinoides | Q. allomorphinoides | % | Alegret, Laia | Counting >63 µm fraction | |
122 | Quadrimorphina cf. allomorphinoides | Q. cf. allomorphinoides | % | Alegret, Laia | Counting >63 µm fraction | |
123 | Quadrimorphina spp. | Quadrimorphina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
124 | Quadrimorphina varsoviensis | Q. varsoviensis | % | Alegret, Laia | Counting >63 µm fraction | |
125 | Reussella szajnochae | R. szajnochae | % | Alegret, Laia | Counting >63 µm fraction | |
126 | Rotamorphina sp. | Rotamorphina sp. | % | Alegret, Laia | Counting >63 µm fraction | questionable |
127 | Saracenaria sp. | Saracenaria sp. | % | Alegret, Laia | Counting >63 µm fraction | |
128 | Scheibnerova sp. | Scheibnerova sp. | % | Alegret, Laia | Counting >63 µm fraction | |
129 | Seabrookia cretacea | S. cretacea | % | Alegret, Laia | Counting >63 µm fraction | |
130 | Siphogenerinoides sp. | Siphogenerinoides sp. | % | Alegret, Laia | Counting >63 µm fraction | |
131 | Stainforthia sp. | Stainforthia sp. | % | Alegret, Laia | Counting >63 µm fraction | |
132 | Stensioeina beccariiformis | S. beccariiformis | % | Alegret, Laia | Counting >63 µm fraction | |
133 | Stilostomella subspinosa | S. subspinosa | % | Alegret, Laia | Counting >63 µm fraction | |
134 | Stilostomella spp. | Stilostomella spp. | % | Alegret, Laia | Counting >63 µm fraction | |
135 | Tappanina selmensis | T. selmensis | % | Alegret, Laia | Counting >63 µm fraction | |
136 | Tappanina spp. | Tappanina spp. | % | Alegret, Laia | Counting >63 µm fraction | |
137 | Valvalabamina lenticula | V. lenticula | % | Alegret, Laia | Counting >63 µm fraction | |
138 | Valvulineria sp. | Valvulineria sp. | % | Alegret, Laia | Counting >63 µm fraction | questionable |
139 | Vaginulina trilobata | V. trilobata | % | Alegret, Laia | Counting >63 µm fraction | |
140 | Foraminifera, benthic | Foram benth | # | Alegret, Laia | Counting >63 µm fraction | total count |
141 | Foraminifera, benthic, epifaunal | Foram benth epifauna | % | Alegret, Laia | Counting >63 µm fraction | epifaunal morphogroups |
142 | Foraminifera, benthic, infaunal | Foram benth infauna | % | Alegret, Laia | Counting >63 µm fraction | infaunal morphogroups |
143 | Shannon Diversity Index | H' | Alegret, Laia | |||
144 | Fishers alpha index of diversity | FAI | Alegret, Laia |
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