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Wells, Patricia; Wells, Graeme; Cali, Joe; Chivas, Allan R (1994): Response of deep-sea benthic foraminifera to Late Quaternary climate changes, southeast Indian Ocean, offshore Western Australia [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.682711, Supplement to: Wells, P et al. (1994): Response of deep-sea benthic foraminifera to Late Quaternary climate changes, southeast Indian Ocean, offshore Western Australia. Marine Micropaleontology, 23(3), 185-229, https://doi.org/10.1016/0377-8398(94)90013-2

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Published: 1994 (exact date unknown) • DOI registered: 2008-03-17

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Abstract:
The Late Quaternary benthic foraminifera of four deep-sea cores off Western Australia (ODP 122-760A, ODP 122-762B, BMR96GC21 and RC9-150) have been examined for evidence of increased surface productivity to explain the anomalously low sea-surface paleotemperatures inferred by planktic foraminifera for the last and penultimate glaciations.
The delta13C trends of Cibicidoides wuellerstorfi, and differences between the delta13C trends of planktics (Globigerinoides sacculifer) and benthics (C. wuellerstorfi) in the four cores indicate that during stage 6 bottom waters were significantly depleted in delta13C, and strong delta13C gradients were established in the water column, while during stage 2 and the Last Glacial Maximum, delta13C trends did not differ greatly from that of the Holocene. Two main assemblages of benthic foraminifera were identified by principal component analyses: one dominated by Uvigerina peregrina, another dominated by U. proboscidea. Abundance of these Uvigerinids, and of taxa preferring an infaunal microhabitat, and of Epistominella exigua and Bulimina aculeata indicate that episodes of high influx of particulate organic matter were established in most sites during glacial episodes, and particularly so during stage 6, while evidence for upwelling during the Last Glacial Maximum is less strong. The Penultimate Glaciation upwellings were established within the areas of low sea-surface paleotemperature indicated by planktic foraminifera. During the Last Interglacial Climax, upwelling appears to have been established in an isolated region offshore from a strengthened Leeuwin Current off North West Cape.
Last Glacial Maximum delta13C values of C. wuellerstorfi at waterdepths of less than 2000 m show smaller than global mean glacial-interglacial changes suggesting the development of a deep hydrological front. A similar vertical stratification/bathyal front was also established during the Penultimate Glaciation.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -22.965292 * Median Longitude: 112.711492 * South-bound Latitude: -31.280000 * West-bound Longitude: 108.500667 * North-bound Latitude: -16.922000 * East-bound Longitude: 115.541300
Date/Time Start: 1965-05-19T00:00:00 * Date/Time End: 1988-07-27T03:25:00
Event(s):
122-760A * Latitude: -16.922000 * Longitude: 115.541300 * Date/Time Start: 1988-07-11T23:15:00 * Date/Time End: 1988-07-14T13:00:00 * Elevation: -1981.0 m * Penetration: 284.9 m * Recovery: 196.38 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg122 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 38 cores; 284.9 m cored; 0 m drilled; 68.9 % recovery
122-762B * Latitude: -19.887000 * Longitude: 112.254000 * Date/Time Start: 1988-07-26T11:00:00 * Date/Time End: 1988-07-27T03:25:00 * Elevation: -1371.0 m * Penetration: 175.4 m * Recovery: 174.9 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg122 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 175.4 m cored; 0 m drilled; 99.7 % recovery
BMR96GC21 * Latitude: -23.772167 * Longitude: 108.500667 * Elevation: -2100.0 m * Recovery: 1.8 m * Location: Southeast Indian Ocean * Method/Device: Core (CORE)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
12 datasets

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Datasets listed in this publication series

  1. Wells, P; Wells, G; Cali, J et al. (1994): (Appendix 1, Table 4) Relative abundances of benthic foraminifera in Late Quaternary sediments of ODP Hole 122-760A in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682697
  2. Wells, P; Wells, G; Cali, J et al. (1994): (Table 5) Stable carbon and oxygen isotope ratios of Late Quaternary foraminifera from ODP Hole 122-760A in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682707
  3. Wells, P; Wells, G; Cali, J et al. (1994): (Table 4) Principal component analysis, paleotemperatures and distribution of infaunal benthic foraminifera in Late Quaternary sediments of ODP Hole 122-760A in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682703
  4. Wells, P; Wells, G; Cali, J et al. (1994): (Appendix 2, Table 4) Relative abundances of benthic foraminifera in Late Quaternary sediments of ODP Hole 122-762B in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682700
  5. Wells, P; Wells, G; Cali, J et al. (1994): (Table 5) Stable carbon and oxygen isotope ratios of Late Quaternary foraminifera from ODP Hole 122-762B in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682708
  6. Wells, P; Wells, G; Cali, J et al. (1994): (Table 4) Principal component analysis, paleotemperatures and distribution of infaunal benthic foraminifera in Late Quaternary sediments of ODP Hole 122-762B in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682704
  7. Wells, P; Wells, G; Cali, J et al. (1994): (Appendix 3, Table 4) Relative abundances of benthic foraminifera in Late Quaternary sediments of core BMR96GC21 in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682701
  8. Wells, P; Wells, G; Cali, J et al. (1994): (Table 5) Stable carbon and oxygen isotope ratios of Late Quaternary foraminifera from sediment core BMR96GC21 in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682709
  9. Wells, P; Wells, G; Cali, J et al. (1994): (Table 4) Principal component analysis, paleotemperatures and distribution of infaunal benthic foraminifera in Late Quaternary sediments of core BMR96GC21 in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682705
  10. Wells, P; Wells, G; Cali, J et al. (1994): (Appendix 4, Table 4) Relative abundances of benthic foraminifera in Late Quaternary sediments of core RC09-150 in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682702
  11. Wells, P; Wells, G; Cali, J et al. (1994): (Table 5) Stable carbon and oxygen isotope ratios of Late Quaternary foraminifera from sediment core RC9-150 in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682710
  12. Wells, P; Wells, G; Cali, J et al. (1994): (Table 4) Principal component analysis, paleotemperatures and distribution of infaunal benthic foraminifera in Late Quaternary sediments of core RC09-150 in the southeast Indian Ocean. https://doi.org/10.1594/PANGAEA.682706