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Widmark, Joen G V; Malmgren, Bjorn (1988): Benthic foraminiferal assemblages of Upper Cretaceous sediments from DSDP Hole 74-527 in the Angola Basin, South Atlantic Ocean (Table I, Appendix II). PANGAEA, https://doi.org/10.1594/PANGAEA.687437, Supplement to: Widmark, JGV; Malmgren, B (1988): Differential dissolution of Upper Cretaceous deep-sea benthonic foraminifers from the Angola Basin, South Atlantic Ocean. Marine Micropaleontology, 13(1), 47-78, https://doi.org/10.1016/0377-8398(88)90012-6

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Abstract:
Material from the Deep Sea Drilling Project (DSDP) Site 527 from the Angola Basin, South Atlantic Ocean, has been analyzed to determine whether Upper Cretaceous benthonic foraminiferal taxa are differentially sensitive to calcite dissolution, and, if so, to rank their order of susceptibility. Two regimes of dissolution, established on the basis of the degree of planktonic foraminiferal fragmentation, representing stronger and less prominent dissolution within the section studied, were used as a framework for reference. A total of 60 calcareous and eight agglutinated benthonic foraminiferal taxa were identified at the species or genus level; of these, twenty-three calcareous and five agglutinated taxa were selected for the dissolution study. Relative abundance of each of the various taxa was tested statistically, using t-test, between dissolution regimes to assess the significance of the change induced by increased dissolution.
Nuttallides truempyi and Neoeponides sp. intermediate form are interpreted as resistant to dissolution. Pullenia spp., Alabamina sp. a, Anomalina sp. a, Praebulimina sp. fusiform, and Nuttallinella sp. a are susceptible to dissolution. The majority of the taxa (16 in number) are unaffected by dissolution because they show no change between dissolution regimes. Among the agglutinated taxa Gaudryina pyramidata is resistant to dissolution, whereas the remaining four taxa are unaffected by dissolution. At the level of superfamilies, one calcareous superfamily (Discorbacea) is resistant, two (Orbitoidacea and Cassidulinacea) are unaffected, and two (Nodosariacea and Buliminacea) are susceptible to dissolution.
Project(s):
Coverage:
Latitude: -28.041500 * Longitude: 1.763300
Date/Time Start: 1980-06-28T00:00:00 * Date/Time End: 1980-06-28T00:00:00
Minimum DEPTH, sediment/rock: 284.69 m * Maximum DEPTH, sediment/rock: 289.34 m
Event(s):
74-527 * Latitude: -28.041500 * Longitude: 1.763300 * Date/Time: 1980-06-28T00:00:00 * Elevation: -4428.0 m * Penetration: 384.5 m * Recovery: 243.4 m * Location: South Atlantic * Campaign: Leg74 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 380 m cored; 4.5 m drilled; 64.1 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmGeocode
2Sample code/labelSample labelWidmark, Joen G VODP sample designation
3Sample code/label 2Sample label 2Widmark, Joen G VS denote samples referable to the regime of stronger dissolution, M indicate samples from the regime of moderate dissolution
4Sample massSamp mgWidmark, Joen G VCounting >125 µm fractiontotal dry sample weight
5Dentalina spp.Dentalina spp.%Widmark, Joen G VCounting >125 µm fraction
6Globulina lacrimaG. lacrima%Widmark, Joen G VCounting >125 µm fraction
7Buliminella beaumontiB. beaumonti%Widmark, Joen G VCounting >125 µm fractiongenus questionable
8Praebulimina sp.Praebulimina sp.%Widmark, Joen G VCounting >125 µm fractioninflated form
9Praebulimina sp.Praebulimina sp.%Widmark, Joen G VCounting >125 µm fractionfusiform
10Reussella szajnochaeR. szajnochae%Widmark, Joen G VCounting >125 µm fraction
11Nuttallides truempyiN. truempyi%Widmark, Joen G VCounting >125 µm fraction
12Nuttallides sp.Nuttallides sp.%Widmark, Joen G VCounting >125 µm fractionvar. a
13Nuttallinella sp.Nuttallinella sp.%Widmark, Joen G VCounting >125 µm fractionvar. a
14Neoeponides hillebrandtiN. hillebrandti%Widmark, Joen G VCounting >125 µm fraction
15Neoeponides sp.Neoeponides sp.%Widmark, Joen G VCounting >125 µm fractionintermediate form
16Neoeponides lunataN. lunata%Widmark, Joen G VCounting >125 µm fraction
17Alabamina sp.Alabamina sp.%Widmark, Joen G VCounting >125 µm fractionvar. a
18Anomalina praeacutaA. praeacuta%Widmark, Joen G VCounting >125 µm fraction
19Anomalina sp.Anomalina sp.%Widmark, Joen G VCounting >125 µm fractionvar. a
20Cibicidoides spp.Cibicidoides spp.%Widmark, Joen G VCounting >125 µm fractionquestionable
21Gavelinella beccariiformisG. beccariiformis%Widmark, Joen G VCounting >125 µm fraction
22Gavelinella hyphalusG. hyphalus%Widmark, Joen G VCounting >125 µm fraction
23Gyroidinoides quadratusG. quadratus%Widmark, Joen G VCounting >125 µm fraction
24Gyroidinoides spp.Gyroidinoides spp.%Widmark, Joen G VCounting >125 µm fraction
25Oridorsalis umbonatusO. umbonatus%Widmark, Joen G VCounting >125 µm fractionquestionable
26Osangularia spp.Osangularia spp.%Widmark, Joen G VCounting >125 µm fractionquestionable
27Pullenia spp.Pullenia spp.%Widmark, Joen G VCounting >125 µm fraction
28NodosariaceaeNodosariaceae%Widmark, Joen G VCounting >125 µm fractionTotal of Nodosariacea
29BuliminaceaBuliminacea%Widmark, Joen G VCounting >125 µm fractionTotal of Buliminacea
30DiscorbaceaDiscorbacea%Widmark, Joen G VCounting >125 µm fractionTotal of Discorbacea
31OrbitoidaceaOrbitoidacea%Widmark, Joen G VCounting >125 µm fractionTotal of Orbitoidacea
32CassidulinaceaCassidulinacea%Widmark, Joen G VCounting >125 µm fractionTotal of Cassidulinacea
33Dorothia trochoidesD. trochoides%Widmark, Joen G VCounting >125 µm fraction
34Gaudryina pyramidataG. pyramidata%Widmark, Joen G VCounting >125 µm fraction
35Spiroplectammina dentataS. dentata%Widmark, Joen G VCounting >125 µm fraction
36Spiroplectammina spp.Spiroplectammina spp.%Widmark, Joen G VCounting >125 µm fraction
37Tritaxia spp.Tritaxia spp.%Widmark, Joen G VCounting >125 µm fraction
38Foraminifera, benthic agglutinatedForam bent agg%Widmark, Joen G VCounting >125 µm fraction
39Foraminifera, benthicForam bent%Widmark, Joen G VCounting >125 µm fractionTotal identified specimens
40Foraminifera, benthic indeterminataForam bent indet%Widmark, Joen G VCounting >125 µm fractionTotal unidentified specimens
41Foraminifera, benthic, fragmentsForam bent fragm%Widmark, Joen G VCounting >125 µm fraction
Size:
960 data points

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