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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1988
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| Online Access: | https://doi.org/10.1594/PANGAEA.687437 |
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| _version_ | 1867170879263211520 |
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| author | Widmark, Joen G V Malmgren, Bjorn |
| author_facet | Widmark, Joen G V Malmgren, Bjorn |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_687437 |
| institution | PANGAEA |
| language | en |
| publishDate | 1988 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Benthic foraminiferal assemblages of Upper Cretaceous sediments from DSDP Hole 74-527 in the Angola Basin, South Atlantic Ocean (Table I, Appendix II) Widmark, Joen G V Malmgren, Bjorn 74-527; Alabamina sp.; Anomalina praeacuta; Anomalina sp.; Buliminacea; Buliminella beaumonti; Cassidulinacea; Cibicidoides spp.; Counting >125 µm fraction; Deep Sea Drilling Project; Dentalina spp.; DEPTH, sediment/rock; Discorbacea; Dorothia trochoides; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Foraminifera, benthic; Foraminifera, benthic, fragments; Foraminifera, benthic agglutinated; Foraminifera, benthic indeterminata; Gaudryina pyramidata; Gavelinella beccariiformis; Gavelinella hyphalus; Globulina lacrima; Glomar Challenger; Gyroidinoides quadratus; Gyroidinoides spp.; Leg74; Neoeponides hillebrandti; Neoeponides lunata; Neoeponides sp.; Nodosariaceae; Nuttallides sp.; Nuttallides truempyi; Nuttallinella sp.; Orbitoidacea; Oridorsalis umbonatus; Osangularia spp.; Praebulimina sp.; Pullenia spp.; Reussella szajnochae; Sample code/label; Sample code/label 2; Sample mass; South Atlantic Ocean; Spiroplectammina dentata; Spiroplectammina spp.; Tritaxia spp. 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. |
| title | Benthic foraminiferal assemblages of Upper Cretaceous sediments from DSDP Hole 74-527 in the Angola Basin, South Atlantic Ocean (Table I, Appendix II) |
| topic | 74-527; Alabamina sp.; Anomalina praeacuta; Anomalina sp.; Buliminacea; Buliminella beaumonti; Cassidulinacea; Cibicidoides spp.; Counting >125 µm fraction; Deep Sea Drilling Project; Dentalina spp.; DEPTH, sediment/rock; Discorbacea; Dorothia trochoides; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Foraminifera, benthic; Foraminifera, benthic, fragments; Foraminifera, benthic agglutinated; Foraminifera, benthic indeterminata; Gaudryina pyramidata; Gavelinella beccariiformis; Gavelinella hyphalus; Globulina lacrima; Glomar Challenger; Gyroidinoides quadratus; Gyroidinoides spp.; Leg74; Neoeponides hillebrandti; Neoeponides lunata; Neoeponides sp.; Nodosariaceae; Nuttallides sp.; Nuttallides truempyi; Nuttallinella sp.; Orbitoidacea; Oridorsalis umbonatus; Osangularia spp.; Praebulimina sp.; Pullenia spp.; Reussella szajnochae; Sample code/label; Sample code/label 2; Sample mass; South Atlantic Ocean; Spiroplectammina dentata; Spiroplectammina spp.; Tritaxia spp. |
| url | https://doi.org/10.1594/PANGAEA.687437 |